7th Grade Math

Reinforcement

of GLE 0606.2.3.

Understand and use

ratios, rates and percents.

Reinforcement of

SPI 0606.2.6 Solve

problems involving ratios,

rates, and percents.

Little League Baseball

In 2009, over 2 million little league

players competed to play in the

Little League World Series. The

annual International Tournament is

held in Williamsport, Pennsylvania.

BASEBALL The distance between bases on a Little League Baseball

diamond is 60 feet. The distance between bases on a Major League

Baseball diamond is 90 feet. What is the relationship between the two

distances?

You can describe the relationship with a ratio. A ratio is a comparison of

two quantities by division.

to :

Simplest Form

BASEBALL Refer to the information above. Write the ratio as a

fraction in simplest form. Then explain its meaning.

Little League

Major League

÷ 30

9060 = ^23

÷ 30

The greatest common

factor, or GCF, is 30.

The ratio of the Little League distance to the Major League distance

is _^23 , 2 : 3, or 2 to 3. That is, for every 2 feet between Little League

bases, there are 3 feet between Major League bases.

Write each ratio as a fraction in simplest form. Then explain its

meaning.

a. 15 girls to 18 boys b. 20 cats to 30 dogs

Lesson 4 Ratios 13

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