Ratio review

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, showing how many times one value contains or is contained within the other.

Front

How do you write a ratio?

Back

Ratios can be written in three ways: as a fraction (a/b), with a colon (a:b), or with the word 'to' (a to b).

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and then solve for the unknown variable.

Front

What is the missing value in the ratio 3:x = 1:5?

Back

The missing value x is 15.

Front

If there are 4 apples and 6 oranges, what is the ratio of apples to oranges?

Back

The ratio of apples to oranges is 4:6, which simplifies to 2:3.

Front

What is the total number of items if there are 8 cats and 12 dogs?

Back

The total number of items is 20 (8 cats + 12 dogs).

Front

What is the fraction of cats to the total number of animals if there are 8 cats and 12 dogs?

Back

Front

If the ratio of boys to girls in a class is 3:4, how many girls are there if there are 12 boys?

Back

If there are 12 boys, then there are 16 girls (using the ratio 3:4).

Front

What is the missing value in the ratio 5:10 = x:20?

Back

The missing value x is 10.