Percent Proportions

Front

What is a percent?

Back

A percent is a way of expressing a number as a fraction of 100. It is denoted by the symbol '%'. For example, 50% means 50 out of 100.

Front

How do you calculate the percent of a number?

Back

To calculate the percent of a number, divide the part by the whole and then multiply by 100. Formula: (Part/Whole) x 100.

Front

What is the percent grade if a student answers 15 out of 20 questions correctly?

Back

75%. (15/20) x 100 = 75%.

Front

If 5 out of 25 students forgot their homework, what percent is that?

Back

20%. (5/25) x 100 = 20%.

Front

What does it mean if a student scores 90% on a test?

Back

It means the student answered 90 out of 100 questions correctly.

Front

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

Back

To find the total, divide the part by the percent (in decimal form). Formula: Total = Part / (Percent/100).

Front

What is 50% of 80?

Back

40. (50/100) x 80 = 40.

Front

If a class has 40 students and 10 are absent, what percent of the class is absent?

Back

25%. (10/40) x 100 = 25%.

Front

What is the formula to find the part when you know the total and the percent?

Back

Part = Total x (Percent/100).

Front

If a store is having a 20% off sale on a $50 item, how much do you save?

Back

$10. (20/100) x 50 = 10.