7th Grade Math

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Percents

PART A B C

Multi-Part

Lesson 1

GLE 0706.2.4

Use ratios, rates and

percents to solve single-

and multi-step problems

in various contexts.

SPI 0706.2.6 Express the

ratio between two quantities

as a percent, and a percent

as a ratio or fraction. Also

addresses GLE 0706.1.7.

320 Percent

Main Idea

Find the percent of

a number.

Percent of a Number

PETS Some students are collecting

money for a local pet shelter. The

model shows that they have raised

60% of their $2,000 goal or $1,200.

1. Sketch the model and
   label using decimals
   instead of percents.


2. Sketch the model using
   fractions instead of
   percents.


3. Use these models to write two multiplication sentences that are
   equivalent to 60% of 2,000 = 1,200.

To find the percent of a number such as 60% of 2,000, you can use

either of the following methods.

• Write the percent as a fraction and then multiply.


• Write the percent as a decimal and then multiply.

Find the Percent of a Number

Find 5% of 300.

Method 2 Write the percent as a decimal.

5% = _^5

100

or 0.05

0.05 of 300 = 0.05 × 300 or 15

Method 1 Write the percent as a fraction.

5% = _^5

100

or _^1

20

_^1

20

of 300 = _^1

20

× 300 or 15

So, 5% of 300 is 15.

Find the percent of each number.

a. 40% of 70 b. 15% of 100 c. 55% of 160

mone

0 400 800 1,200 1,600 2,000

0% 20% 40% 60% 80% 100%

Pet Shelter Fundraiser

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