Unit Rate and Proportions

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 single unit. For example, if a car travels 300 miles in 5 hours, the unit rate is 60 miles per hour.

Front

How do you calculate the unit price?

Back

To calculate the unit price, divide the total price by the number of units. For example, if a 2-ounce bottle of soap costs $1.80, the unit price is $1.80 ÷ 2 = $0.90 per ounce.

Front

What is a proportion?

Back

Front

How can you determine if two ratios are equivalent?

Back

Front

What is the formula to find the missing value in a proportion?

Back

Front

If 3 cups of flour make 60 cookies, how many cups are needed for 90 cookies?

Back

4 1/2 cups of flour are needed for 90 cookies.

Front

What is the best way to compare prices of different quantities?

Back

To compare prices of different quantities, calculate the unit price for each option and choose the one with the lowest unit price.

Front

How do you find the number of items per unit in a bag?

Back

To find the number of items per unit, divide the total number of items by the total weight or volume. For example, if there are 75 pieces of candy in a 15 oz bag, there are 5 pieces per ounce.

Front

What is an equivalent ratio?

Back

An equivalent ratio is a ratio that has the same value when simplified. For example, the ratios 4:5 and 8:10 are equivalent.

Front

How do you solve a problem involving unit rates?

Back

To solve a problem involving unit rates, identify the quantities being compared, calculate the unit rate, and use it to answer the question.