Ratios, Rates & Proportions

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

What is the ratio of red apples to green apples if there are 8 red apples and 6 green apples?

Back

8 red apples to 6 green apples.

Front

How do you determine if two ratios are equivalent?

Back

Two ratios are equivalent if they simplify to the same fraction.

Front

Are the ratios 3:10 and 9:20 equivalent?

Back

No, they are not equivalent.

Front

Which of these ratios is equivalent to 3:4? 12:9, 9:20, 9:12, 803:804

Back

9:12 is equivalent to 3:4.

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two different units, such as miles per hour.

Front

What is a proportion?

Back

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

Front

If you spend $40 on 5 pounds of concrete, how much would it cost for 1 pound?

Back

$8 per pound.

Front

If a recipe calls for a ratio of 2:3 of sugar to flour, how much sugar is needed for 6 cups of flour?

Back

4 cups of sugar.

Front

What is the unit rate of 60 miles in 3 hours?

Back

20 miles per hour.