Ratios and Equivalent 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, often expressed as 'a to b' or 'a:b'.

Front

How do you write a ratio of 2 to 3?

Back

The ratio of 2 to 3 can be written as 2:3 or 2/3.

Front

What is an equivalent ratio?

Back

Equivalent ratios are ratios that express the same relationship between two quantities, even if the numbers are different.

Front

If the ratio of boys to girls in a class is 3:4, how many boys are there if there are 28 girls?

Back

There are 21 boys. (3/4 = x/28, so x = 21.)

Front

What is the ratio of chocolate chips to flour in a recipe that uses 3 cups of flour and 2 cups of chocolate chips?

Back

The ratio of chocolate chips to flour is 2:3.

Front

If a recipe calls for 4 cups of sugar and 6 cups of flour, what is the ratio of sugar to flour?

Back

The ratio of sugar to flour is 2:3.

Front

How can you find an equivalent ratio?

Back

You can find an equivalent ratio by multiplying or dividing both terms of the ratio by the same non-zero number.

Front

What is the ratio of red apples to green apples if there are 4 red apples and 3 green apples?

Back

The ratio of red apples to green apples is 4:3.

Front

In a fruit bowl with 4 apples, 2 bananas, and 5 pears, what is the ratio of pears to all fruit?

Back

The ratio of pears to all fruit is 5:11.

Front

If the ratio of cats to dogs is 5:2 and there are 10 cats, how many dogs are there?

Back

There are 4 dogs. (5/2 = 10/x, so x = 4.)