Percent Proportions

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents a part of a whole.

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 40% of 230, calculate 230 * 0.40 = 92.

Front

What is the formula to find what percent one number is of another?

Back

The formula is: (Part/Whole) * 100. For example, to find what percent 78 is of 450, calculate (78/450) * 100 = 17%.

Front

What is 50% of a number?

Back

50% of a number is half of that number. For example, 50% of 100 is 50.

Front

What is 25% of a number?

Back

25% of a number is one quarter of that number. For example, 25% of 200 is 50.

Front

What is 10% of a number?

Back

10% of a number is one tenth of that number. For example, 10% of 250 is 25.

Front

How do you convert a percent to a decimal?

Back

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

Front

How do you convert a decimal to a percent?

Back

To convert a decimal to a percent, multiply by 100. For example, 0.75 as a percent is 75%.

Front

What is the relationship between fractions and percents?

Back

Percents can be expressed as fractions. For example, 50% is equivalent to 1/2.

Front

What is 90% of 250?

Back

90% of 250 is 225.