Understanding Percents

Divide by 100

Multiply the percent by the whole

Identify the whole and the part

Set up a percent proportion

$150

$20

$120

$30

To impress your friends

To use a calculator more effectively

To make the calculation easier

To ensure the problem was set up correctly

60

30

90

27

5%

1.25%

25%

20%

$2.50

$25

$5

$1.25

$26.25

$25

$30

$31.25

Part over whole equals percent over 100

100 over percent equals part over whole

Whole over part equals 100 over percent

Percent over 100 equals whole over part

$3.70

$4.00

$3.00

$2.50

Check if the answer is reasonable

Divide by the percent

Multiply by 100

Set up a proportion