Rate/Unit Rate

Front

What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another, often expressed as 'a to b'.

Front

What is a unit rate?

Back

A unit rate is a rate in which the second quantity is one unit. It tells you how much of one quantity corresponds to one unit of another quantity.

Front

If the ratio of dogs to cats is 5 to 3 and there are 25 dogs, how many cats are there?

Back

15 cats.

Front

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the first quantity by the second quantity to find out how much of the first quantity corresponds to one unit of the second.

Front

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

Back

$8 per pound.

Front

If a store sees 120 customers in 8 hours, what is the unit rate of customers per hour?

Back

15 customers per hour.

Front

If Justin can type 408 words in 4 minutes, how many words can he type per minute?

Back

102 words per minute.

Front

What is the formula for finding a missing number in a proportion?

Back

Cross-multiply and solve for the missing number.

Front

What does it mean if a unit rate is higher?

Back

A higher unit rate indicates that you are getting more of the first quantity for each unit of the second quantity.

Front

What is the relationship between ratios and proportions?

Back

A proportion states that two ratios are equal.