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 price per gallon of gasoline?

Back

To find the price per gallon, divide the total cost by the number of gallons. For example, if 4 gallons cost $16.80, then $16.80 ÷ 4 = $4.20 per gallon.

Front

How do you find the unit rate of calories per serving?

Back

To find the unit rate of calories per serving, divide the total calories by the number of servings. For example, 1,760 calories for 8 servings is 1,760 ÷ 8 = 220 calories per serving.

Front

What is the formula to find the unit rate?

Back

The formula to find the unit rate is: Unit Rate = Total Quantity / Number of Units.

Front

If 4 servings contain 208 calories, how many calories are in 1 serving?

Back

To find the calories per serving, divide the total calories by the number of servings: 208 ÷ 4 = 52 calories per serving.

Front

How do you calculate the number of pages read per minute?

Back

To calculate pages read per minute, divide the total pages by the total minutes. For example, if 12 pages are read in 9 minutes, then 12 ÷ 9 = 1.3333 pages per minute.

Front

What is the unit rate of pizzas per dollar spent?

Back

To find the unit rate of pizzas per dollar, divide the total number of pizzas by the total cost. For example, if 15 pizzas cost $97.50, then 15 ÷ 97.50 = 0.1538 pizzas per dollar.

Front

What does it mean if a ratio is simplified?

Back

A simplified ratio means that the numbers in the ratio have been reduced to their smallest whole number form.

Front

How can you express a ratio as a fraction?

Back

A ratio can be expressed as a fraction by placing the first quantity over the second quantity. For example, a ratio of 3:4 can be expressed as 3/4.