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 the ratio of 4 red apples to 3 green apples?

Back

4 to 3 or 4:3

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 2:3, how many boys are there if there are 15 girls?

Back

10 boys (because 2/3 = x/15, solving gives x = 10).

Front

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

Back

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

If a recipe calls for 4 cups of sugar for every 2 cups of flour, what is the simplified ratio of sugar to flour?

Back

2:1

Front

What is the ratio of 12 noodles to 4 meatballs?

Back

3:1 (because 12/4 = 3).

Front

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

Back

25 cats (because 5/2 = x/10, solving gives x = 25).

Front

What is the ratio of 30 to 15?

Back

2:1 (because 30/15 = 2).