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 one unit. For example, if you buy 3 apples for $6, the unit rate is $2 per apple.

Front

How do you find the unit rate?

Back

To find the unit rate, divide the total cost by the number of items. For example, if a box of 35 diapers costs $6.99, the unit rate is $6.99 ÷ 35 = $0.20 per diaper.

Front

What is the unit rate of 12 ounces of corn for $1.92?

Back

To find the unit rate, divide the price by the weight: $1.92 ÷ 12 ounces = $0.16 per ounce.

Front

Which is a better buy: a 12 ounce can of corn for $1.92 or a 20 ounce can for $3.00?

Back

The 20 ounce can is a better buy because it costs $3.00 ÷ 20 ounces = $0.15 per ounce, which is cheaper than $0.16 per ounce for the 12 ounce can.

Front

What mathematical operation do ratios involve?

Back

Ratios involve division. They compare two quantities by dividing one by the other.

Front

If Will spent $3.75 for 3 pounds of granola, what is his unit rate in dollars per pound?

Back

The unit rate is $3.75 ÷ 3 pounds = $1.25 per pound.

Front

If I paid $15.00 for 6 gallons of gasoline, what was the price per gallon?

Back

The price per gallon is $15.00 ÷ 6 gallons = $2.50 per gallon.

Front

What is the formula to calculate unit rate?

Back

Unit Rate = Total Cost ÷ Number of Items.

Front

If a car travels 300 miles on 10 gallons of gas, what is the unit rate in miles per gallon?

Back

The unit rate is 300 miles ÷ 10 gallons = 30 miles per gallon.

Front

How can you compare unit rates?

Back

You can compare unit rates by calculating the unit rate for each option and then comparing the values. The lower the unit rate, the better the deal.