Ratios, Rates & Unit Rates

Front

What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another. It can be expressed in three ways: as a fraction (3/4), with a colon (3:4), or in words (3 to 4).

Front

Which of the following is NOT a way to write a ratio? 3=4, 3:4, 3/4, 3 to 4

Back

3=4 is NOT a way to write a ratio.

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two different kinds of quantities, such as speed (miles per hour) or price (cost per item).

Front

What is a unit rate?

Back

A unit rate is a rate in which the second quantity is one unit. For example, if you have 44 stamps on 4 sheets, the unit rate is 11 stamps per sheet.

Front

How do you find the unit rate?

Back

To find the unit rate, divide the first quantity by the second quantity. For example, if you have 44 stamps on 4 sheets, divide 44 by 4 to get 11 stamps per sheet.

Front

If Justin can type 408 words in 4 minutes, how many words can he type in 15 minutes?

Back

1530 words in 15 minutes.

Front

You spend $40 on 5 pounds of concrete. How much can you expect to spend on 8 pounds of concrete?

Back

$64 for 8 pounds.

Front

What is the best buy: 8 pencils for $0.99 or 12 pencils for $1.49?

Back

8 pencils for $0.99 is the best buy.

Front

What is the formula to calculate a rate?

Back

Rate = Quantity 1 / Quantity 2.

Front

What does it mean if a ratio is simplified?

Back

A simplified ratio means that the two quantities are expressed in their smallest whole number form, making it easier to compare.