Percentages Exercise

Abhishek Jain

1. When the price of T.V. sets was increased by 30%, the number of T.V. sets sold decreased by 20%. What was the effect on the sales? a. 5 % increase b. 7 % increase c. 4 % increase d. 8 % increase e. None of these

2. Kiran earns 50% of Raghus salary. Raghu earns 80% of Dineshs salary. If the total salary of the three for a month is Rs. 22,000, how much did Kiran earn that month? a. 5600 b. 5000 c. 4000 d. 4500 e. None of these

3. Janaki spends 20% of her monthly salary for her sons education. When she will get her increment of Rs. 170 next month she plans to spend half of that also for her sons education. The total she would spend then would be Rs. 645. What is her present salary? a. 5600 b. 3200 c. 2800 d. 4500 e. None of these

4. The cloth shop has announced a reduction in price by 25%. How many kurtas priced at Rs. 28 should one buy to avail a total reduction of at least Rs. 40? a. 5 b. 6 c. 4 d. 7 e. None of these

5. One-fourth of a number is 10 less than 30 percent of the same number. What is that number?

a. 600 b. 200 c. 800 d. 500 e. None of these

6. The length of a rectangle is increased by 20%. By what percent should the width be reduced to maintain the same area? a. 15.5 b. 16.5 c. 16.66 d. 18 e. None of these

7. What will be 40% of a number whose 200% is 90? a. 15.5 b. 16.5 c. 16.66 d. 18 e. None of these

8. Gopal spends 60% of his salary on food items, 50% of the remaining on clothes and transport and saves the remaining amount every month. If his annual savings are Rs. 9,600 how much money does he spend on the transport per month? a. 2600 b. 6200 c. 4800 d. data inadequate e. None of these

9. If one-third of one-fourth of a number is 15, what is 30% of that number? a. 56 b. 54 c. 58 d. 50 e. None of these

10. If three-fourth of a number is 244, what will be the approximate value of 136 percent of that number? a. 650 b. 250 c. 850 d. 450 e. None of these

11. What will be the approximate value of 161% of 841? a. 1200 b. 1350 c. 1800 d. 1500 e. None

of these 12. When the price of a toy was increased by 30%, the number of toys sold was decreased by 20%. What was the effect on the sales? a. 6% increase b. 4% deacrease c. 4% increase d. 5% deacrease

e. None of these

13. 30% of As salary is equal to the 20% of th of Bs salary. If Bs salary is Rs. 2400, what is As salary? a. 960 b. 200 c. 800 d. 500 e. None of these

14. In a library, 40% of the total numbers of books are in English, 80% of the rest are in Hindi and the balance 300 books are in other languages. What is the total number of books in the library? a. 2000 b. 2500 c. 2800 d. 2500 e. None of these

15. A businessman invests 70% in machinery, 20% in raw material and has Rs. 16000 cash with him. What is the total investment? a. 1,60,000 b. 1,20,000 c. 1,80,000 d. 1,50,000 e. None of these

16. A man saves 25% of his monthly salary. If on account of rise in prices he is to increase his monthly expenses by 25% he is only able to save Rs. 250 per month. What is his monthly salary? a. 6000 b. 4000 c. 8000 d. 5000 e. None

of these 17. Atuls marks in science are 20 less than 60% of the total marks obtained by him in science and maths together. If the total marks are 250, what are his marks in maths? a. 360 b. 240 c. 480 d. 120 e. None of these 18. In a selection process comprising of written test, group tasks and interview, only 40% qualified in written test, 80% of those passed in written test qualified in group tasks and 65% of these passed in group tasks qualified for interview. If the number of those qualified finally was only 78, what was the total number of candidates who appeared? a. 450 b. 225 c. 375 d. 325 e. None of these 19. A candidate should score 45% marks of the total marks to pass the examination. He gets 520 marks and fails by 20 marks. The total marks in the examination are a. 2400 b. 1200 c. 1800 d. 1500 e. None of these 20. If the population of the town is 64000 and its annual increase is 10%, then its correct population at the end of 3 years will be a. 85484 b. 85384 c. 85184 d. 85284 e. None of these

21. If x% of 1200 is 20 then x is a. 2.5 b. 2 c. 1.66 d. 1.5 e. None of these 22. If y exceeds x by 30% then x is less than y by a. 23 % b. 23 % c. 23 % d. 24 % e. None of these

23. When 80 is subtracted from 80% of a number, the result is 80, and the number is a. 400 b. 200 c. 800 d. 500 e. None of these 24. The price of an article is cut by 25%. To restore it to its original price, the new price must be increased by a. 30.5 b. 33.33 c. 32.333 d. 66.66 e. None of these 25. A and Bs salaries together amount to Rs. 4000. A spends 95% of his salary and B, 85% of his. If now their savings are the same, what is As salary? a. 4000 b. 2000 c. 8000 d. 3000 e. None of these 26. In an examination, 15,000 candidates appeared. Each offered either maths or computer science or both. If 75% offered maths and 45% computer science how many offered both? a. 4000 b. 2000 c. 8000 d. 3000 e. None of these 27. A reduction in the price of orange enables a person to purchase 5 oranges for Re. 1 instead of Rs. 1.50. What is the percentage reduction in price? a. 33.33% b. 20 % c. 25 % d. 50 % e. None of these 28. As income is 25% less than Bs income and Bs income is 20% less than Cs income. If Cs income is Rs. 200, then the income of A is a. 150 b. 180 c. 120 d. 80 e. None of these

29. Rameshs salary was reduced by 20%. In order to have his salary back to original amount it must be raised by a. 33.33% b. 20 % c. 25 % d. 50 % e. None of these 30. A shops receipts on the 1st day of the week were Rs. 20,000 on the second day 25% more than this and on the 3rd day 75% of the sum of the receipts of the first 2 days. What was the average of the receipts during this three day period (in rupees)? a. 24000 b. 26500 c. 26250 d. 23000 e. None of these 31. A man pays 10% of his salary as tax. If after spending 90% of the remainder, he has Rs. 180 left with him, what is his salary before taxation? a. 4000 b. 2000 c. 8000 d. 3000 e. None of these

32. The amount of water that should be added to reduce 8 ml mixer containing 50% alcohol, to a mixer containing 40% alcohol is a. 4 ml b. 2 ml c. 8 ml d. 3 ml e. None of these 33. A man by means of his false balance defrauds his costumers to the extent of 30% by purchasing the goods as well as by selling the goods find his net profit a. 60 b. 65 c. 70 d. 69 e. None of these 34. The salary of a typist was first raised by 20% and then the same was reduced by 10%. If he presently draws Rs. 1100, what was his original salary? a. 1018.52 b. 1016.52 c. 1015.52 d. 1012.52 e. None of these

35. In an examination 65% of the candidates passed in Maths and 75% passed in Science. If 22% failed in both, find the pass percentage who passed in both subjects. a. 62% b. 20 % c. 25 % d. 50 % e. None of these 36. In an election, a candidate secured 42% of the votes. The other candidates secured 58% and defeated him by 480 votes. Find the number of votes polled a. 4000 b. 2000 c. 8000 d. 3000 e. None of these 37. Two numbers are 25% and 50% less than a third number. Express first number as a percentage of the second a. 162% b. 120 % c. 125 % d. 150 % e. None of these 38. A man earns Rs. 7000 in a month and spends 70% of his income. How much does he save in a year? a. 25,200 b. 25000 c. 22,500 d. 26,500 e. None of these 39. The salary of a worker is first increased by 50% and afterwards reduced by 50%. What is net change in his salary? a. 33.33% b. 20 % c. 25 % d. 50 % e. None of these 40. Two numbers are respectively 10% and 20% more than a third number, the percentage that is first of the second is a. 91.6% b. 80 % c. 75 % d. 95 % e. None of these 41. A person saves every year 10% of his income, if his income increased every year by 5% then his savings increase every year

by a. 5% b. 2 % c. 4 % d. 6 % e. None of these 42. If 40% of a number is equal to 240. Find the number a. 500 b. 600 c. 800 d. 750 e. None of these 43. If A% of a number is equal to B% of second number, then the ration between first and second number is a. A:B b. B:A c. (A+B):A d. (A+B):B e. None of these 44. What is 60% of 30% of 900 grams? a. 163 gms b. 164 gms c. 170 gms d. 162 gms e. None of these 45. If 40% of 7 = x% of 80. What is the value of x? a. 3.5 b. 3.25 c. 3.75 d. 4.5 e. None of these 46. What rate percent is 1 minute 48 seconds to an hour? a. 5% b. 2 % c. 4 % d. 6 % e. None of these 47. If two numbers are respectively x% and y% more than a third number, the first as a percent of second is a. 100% b. 100% c. 100% d. 100% e. None of these 48. Two numbers are 20% and 40% less than a third number. Then first number as percentage of the second is .. a. 133.33% b. 120 % c. 125 % d. 150 % e. None of these

49. Adding 12% of x to x is equivalent to multiplying x by what? a. 133.33% b. 120 % c. 112 % d. 150 % e. None of these 50. Subtracting 21% of x from x is equivalent to multiplying x by what a. 0.79 b. 0.5 c. 0.25 d. 0.85 e. None of these

51. If As salary is 50% less than that of B, then how much percent is Bs salary more than that of A? a. 100 % b. 120 % c. 125 % d. 150 % e. None of these 52. If the price of a commodity increases by x%, then reduction in consumption, so as not to increase the expenditure is a. b. c. d. e. None of these 53. If the price of coffee seeds is increased by 50%, find by how much percent a householder must reduce the consumption of coffee so as not to increase the expenditure? a. 33.33% b. 20 % c. 25 % d. 50 % e. None of these 54. If the price of rice falls down by 20% by how much percent must a householder increase his consumption, so as not to decrease expenditure on this item? a. 33.33% b. 20 % c. 25 % d. 50 % e. None of these 55. The price of commodity is diminished by 40% and its consumption increases by 16% find the effect on the revenue. a. 3% increase b. 2% increase c. 5% decrease d. 4% decrease e. None of these

56. A% of B is B% of? a. A b. B c. (A+B) d. (A-B)% e. None of these

57. The price of a radio is cut by 20%. To restore it to the former value the new price must be increased by a. 33.33% b. 20 % c. 25 % d. 50 % e. None of these 58. In an examination 65% of the students passed in Science, 68% passed in Maths and 25% failed in both subject. Find the pass percentage? a. 50% b. 58 % c. 60 % d. 75 % e. None of these 59. In an examination 75% of the students passed in English and 55% passed in Science and 33% failed in both the subjects. Find the pass percentage? a. 50% b. 58 % c. 63 % d. 75 % e. None of these 60. If A% failed in subject 1, and B% is failed in subject 2, and C% failed in both the subject. Find the pass percentage a. [100-(A-B-C)] % b. [100+(A+B-C)] % c. [100-(A-B+C)] % d. [100-(A+B-C)] % e. None of these 61. A reduction of 40% in the price of oranges would enable a person to get 2 dozen more for Rs. 5. Find the reduced price per dozen a. Re. 4 b. Re. 1 c. Re. 2 d. Re. 3 e. None of these 62. Two numbers are 40% and 44% less than a third number. How much percent is the second number less than the first?

a. 5% b. 6.5% c. 6.66 % d. 6.33 % e. None of these

63. The salary of a person is first increased by 20% and then reduced by 20% what is net change in his salary? a. 3% increase b. 4% increase c. 5% decrease d. 4% decrease e. None of these 64. If the price has fallen by 25%, what percent of its consumption be increased so that the expenditure may be the same as before? a. 33.33% b. 20 % c. 25 % d. 50 % e. None of these 65. The salary of Arun is first decreased by 20% and then is increased by 30%. Find the net effect? a. 3% increase b. 4% increase c. 5% decrease d. 4% decrease e. None of these 66. Selling price of a T.V. is increased by 10%. As a result of it, the sale is decreased by 20%. Find the effect on sales a. 13% increase b. 14% increase c. 12% decrease d. 14% decrease e. None of these 67. If Ys salary is 20% more than Xs and Zs salary is 10% less than Ys. How many percent Zs salary is more than Xs? a. 5% b. 8% c. 6% d. 7% e. None of these

68. Ys income is 30% more than Xs and Zs income is 40% more than Ys. How much percent is Zs salary is more than Xs? a. 50% b. 85% c. 82% d. 90% e. None of these 69. Price of Tea is increased by 50%. By how much, new price

must be reduced to restore it to the original price? a. 33.33% b. 20 % c. 25 % d. 50 % e. None of these 70. Price of Coffee is reduced by 25% by how much new price must be increased by to restore it to original price? a. 33.33% b. 20 % c. 25 % d. 50 % e. None of these 71. When 70 is subtracted from 70% of a number, the result is 70. Find the number a. 400 b. 800 c. 250 d. 200 e. None of these 72. The price of cooking gas has increased by 50% the percentage of reduction that a family should effect in the use of gas so as not to increase the expenditure on this account is a. 33.33% b. 20 % c. 25 % d. 50 % e. None of these 73. The price of oil is increased by 25%. If the expenditure is not allowed to increase, the ratio between the reduction in consumption and original consumption is a. 5:1 b. 1:5 c. 3:2 d. 2:3 e. None of these 74. The population of a village is 1600 in 1997. It increases 20% seats annually. How many students will be there in 1999? a. 2300 b. 2100 c. 2302 d. 2306 e. None of these 75. x is six times as large as y. The percentage by which y is less than x is a. 83.33% b. 80 % c. 82 % d. 85 % e. None of these 76. One litre of water is evaporated from 20 litres of solution containing 5% salt. Percentage of salt in the remaining solution

is a. 33.33% b. 20 % c. 25 % d. 50 % e. None of these 77. Which number is 70% less than 90? a. 30 b. 33 c. 27 d. 36 e. None of these 78. A number exceeds 30% of itself by 60. The number is a. 85 b. 85 c. 85 d. 85 e. None of these 79. What percent of 5% of 10% a. 33.33% b. 20 % c. 25 % d. 50 % e. None of these 80. Subtracting 8% of A from A is equivalent to multiplying A by how much? a. 0.92 b. 0.5 c. 0.25 d. 0.8 e. None of these

1. C 2. C 3. C 4. B 5. B 6. C 7. D 8. D 9. B 10. D

11. B

12. C

13. A

14. B

15. A

16. B

17. D

18. C

19. B

20. C

21. C

22. A

23. B

24. B

25. D

26. D

27. A

28. C

29. C

30. C

31. B

32. B

33. D

34. A

35. A

36. D

37. D

38. A

39. C

40. A

41. A

42. B

43. B

44. D

45. C

46. C

47. A

48. A

49. C

50. A

51. A

52. D

53. A

54. C

55. D

56. A

57. C

58. B

59. C

60. D

61. B

62. C

63. B

64. A

65. B

66. C

67. B

68. C

69. A

70. A

71. D

72. A

73. B

74. E 75. A

76. B

77. C

78. B

79. D

80. A