Percent of A Number

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 is 40% of 55?

Back

22

Front

What is 9% of 50?

Back

4.5

Front

If 75% of students in a class are taller than 60 inches, how do you find the number of students shorter than 60 inches?

Back

Subtract the percentage of taller students from 100%. For example, 100% - 75% = 25%. Then, calculate 25% of the total number of students.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide the percentage by 100. For example, 75% becomes 0.75.

Front

What is 75% of 240?

Back

180

Front

If a student answers 80% of 30 problems correctly, how do you find the number of correct answers?

Back

Multiply the total number of problems by the percentage in decimal form: 30 * 0.80 = 24.

Front

What does it mean if a student scored 80% on a test?

Back

It means the student answered 80 out of 100 questions correctly, or in this case, 24 out of 30 problems correctly.

Front

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

Back

Divide the part by the percent (in decimal form). For example, if 22 is 40% of a number, the total is 22 / 0.40 = 55.