Rates and Unit Rates

Front

What is a rate?

Back

A rate is a ratio that compares two different units or measurements.

Front

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the quantity by the number of units. For example, if you can wash 95 cars in 5 days, the unit rate is 95 ÷ 5 = 19 cars per day.

Front

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

Back

60 miles per hour (300 miles ÷ 5 hours = 60 miles/hour).

Front

Solve the proportion: 4/8 = x/16

Back

x = 8.

Front

If a recipe requires 3 cups of flour for 4 servings, how much flour is needed for 1 serving?

Back

0.75 cups of flour (3 cups ÷ 4 servings = 0.75 cups/serving).

Front

What is the unit rate of 675 words in 9 minutes?

Back

75 words per minute (675 words ÷ 9 minutes = 75 words/minute).

Front

Solve the proportion: 10/x = 5/15

Back

x = 6.

Front

If a person can run 12 miles in 2 hours, what is their speed in miles per hour?

Back

6 miles per hour (12 miles ÷ 2 hours = 6 miles/hour).

Front

Lynnette can wash 95 cars in 5 days. How many cars does she wash each day?

Back

19 cars per day (95 cars ÷ 5 days = 19 cars/day).

Front

What is the formula for finding a unit rate?

Back

Unit Rate = Total Quantity ÷ Number of Units.