Aim # 12: How Are Fractions, Decimals, and Percents Related?

A New Approach?

Do NowDivide accordingly:

Do NowDivide accordingly: = 0.421052 . . .

Do NowDivide accordingly: = 0.421052 . . .

= 0.2

Do NowDivide accordingly: = 0.421052 . . .

= 0.2 = 0.04

Do NowDivide accordingly: = 0.421052 . . .

= 0.2 = 0.04 = 0.35

Do NowDivide accordingly: = 0.421052 . . .

= 0.2 = 0.04 = 0.35

= 0.0825

Do NowDivide accordingly: = 0.421052 . . .

= 0.2 = 0.04 = 0.35

= 0.0825 = 0.3333 . . .

Do NowDivide accordingly: = 0.421052 . . .

= 0.2 = 0.04 = 0.35

= 0.0825 = 0.3333 . . . = 0.6666 …

Minilesson:A commercial states “14 % of the dentists interviewed recommend Pest Toothpaste.”

That means 14 out of every 100 recommend the toothpaste.

Minilesson (con’t):

Percent helps us think within our decimal system.

Percent comes from “per cent” meaning “per every hundred”

[Like dollars per pound, mph, etc.]

The word “cent” is found in our money system (a great analogy for percent.”

The word “cent” is found in the words century and centimeters.

Minilesson (con’t):In general

Percent means “what part of one-hundred”

Minilesson (con’t):You convert fractions to N/100 by converting the original fraction to an equivalent fraction with denominator of 100.

X 5

X 5

= 15 %

Minilesson (con’t):You convert fractions to N/100 by converting the original fraction to an equivalent fraction with denominator of 100.

X 12.5

X 12.5

= 12.5 %

HW # 12 Due Monday

Answer the following word problem, and then the questions listed in our textbook.

While playing the game of Monopoly, Joseph saw that he had $2,743 in his account consisting of a certain number of each of the following denominations: $500’s, $100’s, $20’s and $1’s. The number of $500-bills was two less than the number of $100-bills. The number of $20-bills was equal to the number of $100-bills. The number of single dollar bills was 5 more than 3 times the number of $100-bills. How many of each denomination did Joseph have?

Textbook: Read