Ratios

What is a ratio?

A ratio is a way to compare two different quantities.

I have three oranges and two apples.
3 oranges : 2 apples.
3 oranges to 2 apples.

Ratios

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Ratios can be written in many different ways.
They can be written using a colon, a fraction, and in word form.

2:3

2/3

two apples to three oranges

Ratios

Charlie and Joe are at a baseball game. They notice that there are baseballs and bats laying on the ground in the dugout. Charlie says the ratio of baseballs to bats is six to seven.

Charlie is using word form.

Ratios

Charlie and Joe are at a baseball game. They notice that there are baseballs and bats laying on the ground in the dugout. Joe says the ratio of baseballs to bats is 6:7.

Joe is writing the ratio using a colon.

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Ratios

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Charlie and Joe are at a baseball game. They notice that there are baseballs and bats laying on the ground in the dugout. Joe says the ratio of baseballs to bats is 6:7.

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When writing ratios you need to make sure to write it the way the question is asking. If the question was asking 'What is the ratio of bats to baseballs?' and Joe said 6:7 still he would be incorrect.

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Ratios

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Ratios

In this picture there are three adults to two children.
The ratio of adults to children in fraction form is 3/2.

In this picture there are two girls to three boys.
The ratio of girls to boys is 2:3 using a colon.

Ratios

Standard: NY-6.RP.1
Understand the concept of a ratio and use ratio language to describe a ratio relationship between two quantities.

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