REVIEW Ratios and Rates

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 a rate?

Back

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

Front

How do you calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (as a decimal). For example, to find 20% of 50, calculate 50 x 0.20 = 10.

Front

What is 50% of 200?

Back

100

Front

What is the formula for finding speed?

Back

Speed = Distance ÷ Time.

Front

If a car travels 300 miles in 5 hours, what is its speed?

Back

60 miles per hour.

Front

What is an equivalent ratio?

Back

Equivalent ratios are two or more ratios that express the same relationship between numbers.

Front

Complete the ratio: 1:2, 2:4, __:8.

Back

4:8.

Front

What is 25% of 80?

Back

20

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.