Rates and Unit Rate

Front

What is a rate?

Back

A rate is a ratio that compares two different quantities, often with different units, such as speed (miles per hour) or cost (dollars per pound).

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 can buy 5 apples for $10, the unit rate is $2 per apple.

Front

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the first quantity by the second quantity. For example, if you travel 150 miles in 3 hours, the unit rate is 150 miles ÷ 3 hours = 50 miles per hour.

Front

If Antonia can type 408 words in 4 minutes, how many words can she type per minute?

Back

102 words per minute.

Front

You spend $40 on 5 pounds of concrete. What is the unit rate in dollars per pound?

Back

$8 per pound.

Front

Which is the better buy? A 12-pack of Pepsi for $3.50 or a 6-pack for $1.80?

Back

The 12-pack is the better buy.

Front

If Ernie traveled 195 miles in 3 hours, how fast is he traveling?

Back

65 miles per hour.

Front

What is the price of gas per gallon if it cost $46.80 to fill a 13-gallon tank?

Back

$3.60 per gallon.

Front

What is the formula for calculating speed?

Back

Speed = Distance ÷ Time.

Front

What does it mean if a unit rate is lower than another?

Back

It means that the first option is a better deal or more efficient than the second option.