Rates & Unit Rates

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together. It expresses how much of one quantity corresponds to one unit of another quantity.

Front

How do you calculate the unit rate from a total quantity?

Back

To calculate the unit rate, divide the total quantity by the number of units. For example, if you have 36 cookies for $4, the unit rate is 36 cookies ÷ 4 dollars = 9 cookies per dollar.

Front

If a printer prints 28 photos in 8 minutes, how do you find the time to print one photo?

Back

To find the time to print one photo, divide the total time by the number of photos. In this case, 8 minutes ÷ 28 photos = 0.2857 minutes per photo.

Front

What is the formula to find the cost of multiple items based on a known cost?

Back

The formula is: Total Cost = (Cost per item) × (Number of items). For example, if 1 pizza costs $8, then 9 pizzas cost $8 × 9 = $72.

Front

How do you find the unit rate in dollars per pound?

Back

To find the unit rate in dollars per pound, divide the total cost by the total weight. For example, if $40 is spent on 5 pounds of concrete, the unit rate is $40 ÷ 5 pounds = $8 per pound.

Front

What is the unit rate for John who can eat 15 hotdogs in 3 minutes?

Back

The unit rate is calculated by dividing the number of hotdogs by the time in minutes: 15 hotdogs ÷ 3 minutes = 5 hotdogs per minute.

Front

If you buy 36 cookies for $4, what is the unit rate in cookies per dollar?

Back

The unit rate is 9 cookies per dollar.

Front

How long does it take to print 21 photos if a printer prints 28 photos in 8 minutes?

Back

It takes 6 minutes to print 21 photos.

Front

If Mr. Daggett bought 6 pizzas for $48, how much would 9 pizzas cost?

Back

9 pizzas would cost $72.

Front

What is the unit rate in dollars per pound if you spend $40 on 5 pounds of concrete?

Back

The unit rate is $8 per pound.