Percent of a Number

Front

What is a percent?

Back

A percent is a way to express a number as a fraction of 100. It is often used to compare ratios.

Front

How do you calculate the percent of a number?

Back

To calculate the percent of a number, multiply the number by the percent (in decimal form). For example, to find 20% of 50, calculate 50 * 0.20 = 10.

Front

What does it mean to find '60% of 45'?

Back

It means to calculate how much 60 out of every 100 parts of 45 is. This can be done by multiplying 45 by 0.60.

Front

If 60% of a group does something, how do you find out how many do not?

Back

To find out how many do not, subtract the percent that does from 100%. For example, if 60% do something, then 40% do not.

Front

What is 15% of 82?

Back

15% of 82 is calculated as 82 * 0.15 = 12.3.

Front

How do you convert a percent to a decimal?

Back

To convert a percent to a decimal, divide the percent by 100. For example, 25% becomes 0.25.

Front

What is 122% of 42?

Back

122% of 42 is calculated as 42 * 1.22 = 51.24.

Front

If there are 55 jellybeans and 40% are red, how many are red?

Back

To find the number of red jellybeans, calculate 55 * 0.40 = 22.

Front

What is the formula to find the percent of a number?

Back

The formula is: Percent = (Part/Whole) * 100.

Front

How do you find the total number if you know the percent and the part?

Back

To find the total, use the formula: Total = Part / (Percent/100).