Rates and Unit Rates

Front

What is a rate?

Back

A rate is a ratio that compares two different kinds of quantities, such as distance and time.

Front

What is a unit rate?

Back

A unit rate is a rate in which the second quantity is one unit. For example, 60 miles per hour is a unit rate.

Front

How do you calculate the unit rate?

Back

To calculate the unit rate, divide the first quantity by the second quantity.

Front

If a 20-lb bag of dog food costs $23.44, what is the cost per pound?

Back

$1.17 per pound (calculated as $23.44 ÷ 20).

Front

What is the formula to find the cost per unit?

Back

Cost per unit = Total cost ÷ Number of units.

Front

If you buy 5 pounds of meat for $5.50, how much is it per pound?

Back

$1.10 per pound (calculated as $5.50 ÷ 5).

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

How do you express a ratio?

Back

A ratio can be expressed in three ways: as a fraction, with a colon (e.g., 20:9), or with the word 'to' (e.g., 20 to 9).

Front

What is the ratio of 20 apples in the fridge to 9 apples on the table?

Back

20:9 or 20/9.

Front

What does it mean to round to the nearest cent?

Back

Rounding to the nearest cent means adjusting a number to the closest hundredth place, which is the second digit after the decimal point.