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 you buy 3 pounds of apples for $3.60, the unit rate is the cost per pound.

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 1500 students and 75 classrooms, the unit rate of students per classroom is 1500 ÷ 75 = 20 students per classroom.

Front

Find the unit rate: $3.60 for 3 pounds of apples.

Back

$1.20 per pound.

Front

What is the unit rate of 1500 students in 75 classrooms?

Back

20 students to 1 classroom.

Front

If Jan ran 5 miles in 48 minutes, what is her time per mile?

Back

9.6 min/mi.

Front

What is density in terms of unit rate?

Back

Density is the ratio of mass to volume, expressed as mass per unit volume.

Front

Calculate the density of a 3-liter jug of honey with a mass of 4.5kg.

Back

1-liter jug has a mass of 1.5kg.

Front

Find the cost per ticket if $279 is paid for 9 concert tickets.

Back

$31 per ticket.

Front

What does it mean to express a quantity as a unit rate?

Back

Expressing a quantity as a unit rate means simplifying the ratio to show how much of one item corresponds to one unit of another item.

Front

If a car travels 300 miles in 5 hours, what is the unit rate of miles per hour?

Back

60 miles per hour.