Interpreting 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 a box of 35 diapers costs $6.99, the unit rate is the cost per diaper.

Front

How do you find the unit rate?

Back

To find the unit rate, divide the total amount by the number of units. For example, if 5 pounds of concrete costs $40, the unit rate is $40 ÷ 5 = $8 per pound.

Front

What is a ratio?

Back

A ratio is a relationship between two numbers that shows how many times the first number contains the second. For example, the ratio of 2 to 3 can be written as 2:3.

Front

When are ratios useful?

Back

Ratios are useful when you want to compare a part to a whole or compare two quantities.

Front

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

Back

15 customers per hour.

Front

If a box of 35 diapers costs $6.99, what is the unit rate per diaper?

Back

$0.20 per diaper.

Front

What is the formula to calculate unit rate?

Back

Unit Rate = Total Amount ÷ Number of Units.

Front

If you spend $40 on 5 pounds of concrete, what is the unit rate in dollars per pound?

Back

$8 per pound.

Front

What does it mean to compare a part to a whole?

Back

It means to look at how one part relates to the total amount. For example, if 3 out of 12 students are girls, the ratio of girls to the total number of students is 3:12.

Front

What is the unit rate of 50 miles in 2 hours?

Back

25 miles per hour.