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 a car travels 300 miles in 5 hours, the unit rate is 60 miles per hour.

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 120 customers in 8 hours, the unit rate is 120 ÷ 8 = 15 customers per hour.

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 quantity: $1.92 ÷ 12 ounces = $0.16 per ounce.

Front

Which is the 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 the better buy because it costs $0.15 per ounce compared to $0.16 per ounce for the 12 ounce can.

Front

If 2 drops of red are mixed with 3 drops of yellow, how many drops of red are needed for 36 drops of yellow?

Back

If the ratio is 2:3, then for 36 drops of yellow, you need 24 drops of red (2/3 = x/36, so x = 24).

Front

What is the unit rate of 120 customers in 8 hours?

Back

The unit rate is 15 customers per hour (120 ÷ 8 = 15).

Front

If Julie can type 300 words in 5 minutes, how many words can she type in an hour?

Back

Julie can type 3600 words in an hour (300 words in 5 minutes means 60 minutes would be 300 x 12 = 3600).

Front

Which is the better buy: a 12 pack of Coke for $3.50 or a 6 pack for $1.80?

Back

The 12 pack of Coke is the better buy because it costs $0.29 per can compared to $0.30 per can for the 6 pack.

Front

What is the formula for finding a unit rate?

Back

The formula for finding a unit rate is: Unit Rate = Total Quantity / Total Time or Total Cost.

Front

If a recipe calls for 4 cups of flour for 2 batches, how much flour is needed for 5 batches?

Back

You would need 10 cups of flour for 5 batches (4 cups ÷ 2 batches = 2 cups per batch; 2 cups x 5 batches = 10 cups).