Comparing Unit Rates (Better Buy)

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 one unit. For example, if you 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 a car travels 150 miles in 3 hours, the unit rate is 150 miles ÷ 3 hours = 50 miles per hour.

Front

What is the unit rate of 16 miles in 6 days?

Back

The unit rate is 16 miles ÷ 6 days = approximately 2.67 miles per day.

Front

If a printer can print 24 pages in 15 minutes, how many pages can it print in 1 hour?

Back

96 pages. (1 hour = 60 minutes; 60 minutes ÷ 15 minutes = 4; 24 pages × 4 = 96 pages.)

Front

If Kevin bought 3 lbs of lettuce for $3.54, how much did the lettuce cost per pound?

Back

$1.18 per pound. (Total cost $3.54 ÷ 3 lbs = $1.18 per lb.)

Front

How do you find the better buy between two products?

Back

Calculate the unit price of each product and compare them. The product with the lower unit price is the better buy.

Front

What is the unit price of Goldfish crackers priced at $1.99 for 7.2 oz?

Back

The unit price is $1.99 ÷ 7.2 oz = approximately $0.28 per oz.

Front

What is the unit price of Cheez-its priced at $2.70 for 13.7 oz?

Back

The unit price is $2.70 ÷ 13.7 oz = approximately $0.20 per oz.

Front

Which of the following is NOT a unit rate: 45 miles per hour, 27 sandwiches in 3 weeks, or 2 cars?

Back

27 sandwiches in 3 weeks is NOT a unit rate because it does not express a quantity per one unit.

Front

What is the unit rate of 48 pages printed in 30 minutes?

Back

The unit rate is 48 pages ÷ 30 minutes = 1.6 pages per minute.