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 value of one. It is often used to determine the cost per item or the rate of speed.

Front

How do you calculate the unit rate from a total cost and total time?

Back

To calculate the unit rate, divide the total cost by the total time. For example, if a bike rental costs $79.80 for 6 hours, the unit rate is $79.80 ÷ 6 = $13.30 per hour.

Front

If a car drives 527 miles on 17 gallons of gas, how do you find the miles per gallon (mpg)?

Back

To find the miles per gallon, divide the total miles driven by the total gallons of gas used. In this case, 527 miles ÷ 17 gallons = 31 mpg.

Front

What is the formula to compare two different prices for the same quantity?

Back

To compare two different prices for the same quantity, calculate the unit price for each option by dividing the total price by the quantity. The option with the lower unit price is the better deal.

Front

How do you find the unit price of an item?

Back

To find the unit price, divide the total price by the total weight or quantity of the item. For example, if Sara Lee Turkey costs $6.58 per lb, the unit price is $6.58 per lb.

Front

What is the better deal: 12 gallons of gas for $33 or 5 gallons for $14?

Back

To determine the better deal, calculate the unit price for each option. For 12 gallons, the unit price is $33 ÷ 12 = $2.75 per gallon. For 5 gallons, the unit price is $14 ÷ 5 = $2.80 per gallon. The better deal is 12 gallons for $33.

Front

How do you compare the unit prices of two different brands of turkey?

Back

Calculate the unit price for each brand. For Sara Lee Turkey at $6.58 per lb, the unit price is $6.58. For Butterball Turkey at $11.16 for 2 lbs, the unit price is $11.16 ÷ 2 = $5.58 per lb. The better deal is Sara Lee.

Front

What is the unit price of Cheerios if it costs $3.68 for 17 oz?

Back

To find the unit price, divide the total price by the total ounces: $3.68 ÷ 17 oz = $0.216 per oz.

Front

What is the unit price of Apple Jacks if it costs $2.89 for 13 oz?

Back

To find the unit price, divide the total price by the total ounces: $2.89 ÷ 13 oz = $0.222 per oz.

Front

Which cereal is the better deal: Cheerios or Apple Jacks?

Back

Cheerios has a unit price of $0.216 per oz, while Apple Jacks has a unit price of $0.222 per oz. Therefore, Cheerios is the better deal.