Percent Proportions

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents how much of something there is out of a total of 100.

Front

How do you calculate the percent of a number?

Back

To calculate the percent of a number, multiply the number by the percent (as a decimal) and then divide by 100.

Front

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

Back

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

Front

If 78 is what percent of 450, how do you set up the equation?

Back

Set up the equation as: (78/450) x 100 = Percent.

Front

What is 60 out of 75 as a percent?

Back

(60/75) x 100 = 80%.

Front

How do you find 15% of a number?

Back

Multiply the number by 0.15 (which is 15% as a decimal).

Front

What is the percentage of correct answers if a student got 36 correct out of 40 questions?

Back

(36/40) x 100 = 90%.

Front

How do you find the number of correct answers from a percent?

Back

Multiply the total number of questions by the percent (as a decimal). For example, for 85% of 25 questions: 25 x 0.85 = 21.

Front

What does it mean if a student scores 100% on a test?

Back

It means the student answered all questions correctly.

Front

How can you convert a fraction to a percent?

Back

Divide the numerator by the denominator and multiply by 100.