Rates & Percents

White Black Hispanic

Total People Living in Poverty

26,038,000 9,393,000 9,132,000

Total People in U.S. 238,000,000 38,028,000 41,698,000

Percent of People

Living in Poverty by

Race

10.9% 24.7% 21.9%

What is a percent?

What does it mean to have, for example, 30% of

something?

If I have a Pizza with 100 slices, how many slices is 30% ?

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If I have a Pizza with 10 slices, how many slices is 30% ?

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If I have a Pizza with 5 slices, how many slices is 30% ?

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Definitions• Rate - a measure, quantity or frequency

measured against some other quantity or measure– 45 miles per hour– 2/3 cup of milk– 97 people per 100,000

• Percent - the rate, number, or amount in each 100

To calculate a percent (Method 1)

100=

Part

Whole

%Part • 100 = % • Whole

Find 27% of 262

=Part

Whole

%

100

x

262

27

x • 100 = 27 • 262

100x = 7074 100 = 100

x = 70.74

To calculate a percent (Method 2 - only works when you’re trying

to find the part)

Part • 100 = % • Whole100 100

%100

• WholePart =

Find 27% of 262

27100

• 262 x =

.27 • 262 x =

70.74 x =

262 100x 27

=

Find 27% of 262

What is 37% of 40?

What is 40% of 37?

Part = % • Whole100

x = 37 • 40100

x = .37 • 40

x = 14.8

Part = % • Whole100

x = 40 • 37100

x = .40 • 37

x = 14.8