Percent of A Number Review

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 a percent of a number?

Back

To calculate a 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 'X percent of Y'?

Back

Finding 'X percent of Y' means calculating how much X percent represents in relation to Y.

Front

What is 50% of a number?

Back

50% of a number is half of that number. For example, 50% of 80 is 40.

Front

What is 100% of a number?

Back

100% of a number is the whole number itself. For example, 100% of 30 is 30.

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% as a decimal is 0.25.

Front

What is the formula to find the whole number when given a percent and a part?

Back

The formula is: Whole = Part / (Percent in decimal form). For example, if 12 is 30% of a number, the whole number is 12 / 0.30 = 40.

Front

If 20% of a number is 10, what is the number?

Back

The number is 50, because 10 / 0.20 = 50.

Front

What is 12% of 85?

Back

12% of 85 is 10.2.

Front

If a student scored 74% on a test with 23 questions, how many did they answer correctly?

Back

The student answered about 17 questions correctly.