Ratios and Proportions

Front

What is a ratio?

Back

A ratio is a comparison of two quantities using division.

Front

What is a rate?

Back

A rate is a ratio of two quantities with different units.

Front

How do you calculate the unit price?

Back

To calculate the unit price, divide the total cost by the total quantity.

Front

If Camille bought 3 pounds of nuts for $10.35, what is the unit price per pound?

Back

$3.45 per pound.

Front

What is the formula for the perimeter of a pentagon with equal sides?

Back

P = 5s, where s is the length of one side.

Front

If Mrs. Graham put 150 gallons of water into a pool in 6 minutes, what is the rate of water flow in gallons per minute?

Back

25 gallons per minute.

Front

How long will it take to fill a 20,000-gallon pool at the same rate?

Back

800 minutes.

Front

What is the relationship between ratios and proportions?

Back

Proportions are equations that state two ratios are equal.

Front

If a recipe calls for a ratio of 2:3 of sugar to flour, how much sugar is needed for 9 cups of flour?

Back

6 cups of sugar.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.