Writing Ratios

Front

What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another.

Front

How do you write a ratio?

Back

Ratios can be written in three ways: using a colon (e.g., 3:2), as a fraction (e.g., 3/2), or with the word 'to' (e.g., 3 to 2).

Front

What is a part-to-part ratio?

Back

A part-to-part ratio compares two parts of a whole. For example, the ratio of red apples to green apples.

Front

What is a part-to-whole ratio?

Back

A part-to-whole ratio compares a part of a group to the entire group. For example, the ratio of pears to all fruit.

Front

If there are 4 red apples and 3 green apples, what is the ratio of red apples to green apples?

Back

4 red apples to 3 green apples.

Front

What is the ratio of flames to arms on a candle if there are 3 flames and 2 arms?

Back

3:2.

Front

In a pet shop with 2 dogs, 4 cats, and 5 hamsters, what is the ratio of dogs to all pets?

Back

2:11.

Front

What type of ratio is '4 apples to 2 bananas'?

Back

Part-to-part ratio.

Front

What type of ratio is '5 pears to all fruit in a bowl with 4 apples, 2 bananas, and 5 pears'?

Back

Part-to-whole ratio.

Front

If a recipe calls for 2 cups of flour and 3 cups of sugar, what is the ratio of flour to sugar?

Back

2:3.