Finding Unit Rates

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities where one of the quantities is expressed as a quantity of one. For example, if you can buy 3 apples for $6, the unit rate is $2 per apple.

Front

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the first quantity by the second quantity. For example, if you have 5 books read in 16 hours, the unit rate is 5 ÷ 16 = 5/16 books per hour.

Front

If a car travels 150 miles in 3 hours, what is the unit rate in miles per hour?

Back

50 miles per hour (150 miles ÷ 3 hours = 50 miles/hour).

Front

What is the unit rate of 24 flowers planted in 2 hours?

Back

12 flowers per hour (24 flowers ÷ 2 hours = 12 flowers/hour).

Front

If you earn $30 for 5 hours of work, what is your unit rate in dollars per hour?

Back

$6 per hour ($30 ÷ 5 hours = $6/hour).

Front

Which of the following is a unit rate: 70 miles per hour, 15 pages per 20 minutes, or $15 per pound?

Back

70 miles per hour and $15 per pound are unit rates; 15 pages per 20 minutes is not a unit rate.

Front

What operation do you use to find a unit rate?

Back

Division.

Front

If you have a ratio of 60 to 4 hours, what is the unit rate?

Back

15 (60 ÷ 4 = 15).

Front

What is the unit rate of 100 kilometers in 2 hours?

Back

50 kilometers per hour (100 km ÷ 2 hours = 50 km/hour).

Front

If a recipe calls for 3 cups of flour for 12 cookies, what is the unit rate of flour per cookie?

Back

0.25 cups of flour per cookie (3 cups ÷ 12 cookies = 0.25 cups/cookie).