Proportions Practice

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.

Front

What is a ratio?

Back

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

Front

If the ratio of boys to girls is 3 to 2, how many girls are there if there are 12 boys?

Back

8 girls.

Front

What is the formula for finding a missing value in a proportion?

Back

If a/b = c/d, then ad = bc.

Front

How can you express a ratio as a fraction?

Back

A ratio can be expressed as a fraction by placing the first quantity over the second quantity.

Front

If 13 out of 20 homes have a personal computer, how many homes would have one on a street with 60 homes?

Back

39 homes.

Front

What is the relationship between ratios and proportions?

Back

Ratios compare two quantities, while proportions show that two ratios are equal.

Front

How do you find the unit rate?

Back

To find the unit rate, divide the first quantity by the second quantity.

Front

If a recipe calls for 1.5 cups of milk for every 3 cups of flour, how much milk is needed for 5 cups of flour?

Back

2.5 cups of milk.