Ratios and 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, often expressed as 'a to b' or a:b.

Front

What is a unit rate?

Back

A unit rate is a ratio that compares a quantity to one unit of another quantity, often expressed as 'x per 1 unit'.

Front

How do you calculate the unit price?

Back

To calculate the unit price, divide the total cost by the number of items. For example, if 7 DVDs cost $23.31, the unit price is $23.31 ÷ 7.

Front

If 4 gallons of gasoline cost $16.80, what is the price per gallon?

Back

$4.20 per gallon.

Front

What is the unit rate if there are 208 calories in 4 servings?

Back

52 calories per serving.

Front

How do you find the unit rate from total calories and servings?

Back

Divide the total calories by the number of servings. For example, 1760 calories ÷ 8 servings = 220 calories per serving.

Front

If a 7-pack of DVDs costs $23.31, what is the unit price per DVD?

Back

$3.33 per DVD.

Front

What is the unit rate if there are 1,760 calories in 8 servings?

Back

220 calories per serving.

Front

How do you calculate the cost per pizza if 15 pizzas cost $97.50?

Back

$6.50 per pizza.

Front

What is the formula to find a unit rate?

Back

Unit Rate = Total Quantity ÷ Number of Units.