copyright © 2000 by monica yuskaitis revised by frankie welch 2012

Percent can be defined as “of one hundred.”

Copyright © 2000 by Monica Yuskaitis

100of

“Cent” comes from the Latin and means 100.


Many words have come from the root cent such as century, centimeter,centipede, & cent.

The letter C in Roman Numerals

stands for 100 or “cent”.


CCC means threehundred.

We write our change from a dollar in hundredths.


If you understandmoney, learning percents is a breeze.

$ .50 is ½ of a dollar 50% also means ½


50¢

50¢

=$1.00

50% means ½ 50% of 6 stars is 3 stars


=50% of


50% .5050100

12= = =

Decimal FractionFraction

SimplifiedPercent


50 parts out of 100 or 50 hundredths.1 2 3 4 5 6 7 8 9 10

11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

31 32 33 34 35 36 37 38 39 40

41 42 43 44 45 46 47 48 49 50

51 52 53 54 55 56 57 58 59 60

61 62 63 64 65 66 67 68 69 70

71 72 73 74 75 76 77 78 79 80

81 82 83 84 85 86 87 88 89 90

91 92 93 94 95 96 97 98 99 100

$ .10 is 1/10 of a dollar 10% also means 1/10


=$1.00

10¢

10¢

10¢

10¢

10¢

10¢

10¢

10¢

10¢

10¢

10% means 1/10 10% of 10 ice creams is 1 ice cream


=10% of


10% .1010100

110= = =

Decimal FractionFraction

SimplifiedPercent


10 parts out of 100 or 10 hundredths.1 2 3 4 5 6 7 8 9 10

11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

31 32 33 34 35 36 37 38 39 40

41 42 43 44 45 46 47 48 49 50

51 52 53 54 55 56 57 58 59 60

61 62 63 64 65 66 67 68 69 70

71 72 73 74 75 76 77 78 79 80

81 82 83 84 85 86 87 88 89 90

91 92 93 94 95 96 97 98 99 100

.50 = 50% = 50/100 = ½ . 25 = .10 = .75 = .05 =

Now let’s see why..

40% = 40 = 2 100 5

35% = ___ = ___

35 7

100 20

Do these:24%79%98%Can you do this one?103%

Write a few for your seat

neighbor and exchange.

To go from percent to fractions, all you do is put the percent over 100! Then simplify.

Method One Multiply denominator by whatever it

takes to get to 100. (equivalent fractions)

Do the same to the numerator. 4 x 20 = 80 = 80% 5 x 20 100

Do this one: 1 x _____ = _____ = _____% 4 x 100

Method Two Divide the denominator into the numerator to

turn it into a decimal.

4 5 __ 0. 8___ fractions to perrrcents 5 l 4 . 0 move decimal

two - 4 0 times to the

rrrright! _____ = 80%

75% = .75 38% = .38

Do this one: 67% = ______

To change from percent to decimalllll just move the decimal two times to the lllleft.

You can also divide the percent by 100.

FractionsDecimalsPercents

1/5 = .20 = 20%


copyright © 2000 by monica yuskaitis revised by frankie welch 2012

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