Ratios, Rates and Unit Rates

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two different units, such as miles per hour or cost per item.

Front

What is a unit rate?

Back

A unit rate is a rate in which the second quantity is one unit, such as $0.50 per cookie.

Front

How do you calculate the unit rate?

Back

To find the unit rate, divide the total amount by the number of units. For example, if 10 cookies cost $4.00, the unit rate is $4.00 ÷ 10 = $0.40 per cookie.

Front

If the unit rate for chocolate chip cookies is $0.25 per cookie, how much for 8 cookies?

Back

$2.00

Front

Cookies cost $4.00 for 10. What is the unit rate per cookie?

Back

$0.40

Front

Which of these is a unit rate? 1 giant donut per 2 kids, 2 busses : 110 kids, 12 pizzas / 2 classes, 55 kids per 1 bus.

Back

55 kids per 1 bus.

Front

If a bookstore charges the same amount for each used book and Susie bought 6 books for $12, how much is each book?

Back

$2

Front

Express 12:30 in simplest form.

Back

2:5

Front

What is the formula to find a ratio?

Back

The formula to find a ratio is: Ratio = Quantity A : Quantity B.