7th Grade Math

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Proportions and Equations

PART A B CDE

Multi-Part

Lesson 2

GLE 0706.2.3

Develop an understanding of

and apply proportionality.

GLE 0706.2.4 Use ratios,

rates and percents to solve

single- and multi-step

problems in various contexts.

Also addresses SPI 0706.2.6,

SPI 0706.2.7.

332 Percent

The Percent Proportion

MONSTER TRUCKS The

tires on a monster truck

weigh approximately 3,600

pounds. The entire truck

weighs about 11,000 pounds.

1. Write the ratio of tire
   weight to total weight
   as a fraction.


2. Use a calculator to
   write the fraction
   as a decimal to the
   nearest hundredth.


3. What percent of the monster truck’s weight is the tires?

In a percent proportion, one ratio or fraction compares part of a

quantity to the whole quantity. The other ratio is the equivalent

percent written as a fraction with a denominator of 100.

=

out of is %.

percent

part

whole

100%

5

10% 10% 10% 10% 10% 10% 10% 10% 10% 10%

Types of Percent Problems

Type Example Proportion

Find the Percent What percent of 5 is 4? ^45 = 100 n

Find the Part What number is 80% of 5?

p

_ 5 = _ 10080

Find the Whole 4 is 80% of what number? _^4

w

= _ 10080

Main Idea

Solve problems using

the percent proportion.

Vocabulary

percent proportion

V

p

11010101011101010 nnn 000000000000000

ti

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