Percents & Percent Proportions

Front

What is a percent?

Back

A percent is a way to express 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 convert a decimal to a percent?

Back

To convert a decimal to a percent, multiply the decimal by 100 and add the percent symbol. For example, 0.75 becomes 75%.

Front

What is the formula for finding a percent of a number?

Back

The formula is: Percent = (Part/Whole) x 100. This helps to find what percentage a part is of the whole.

Front

What does 'Part' mean in percent problems?

Back

'Part' refers to the portion of the whole that you are interested in. For example, if you have 20 apples and 5 are red, the 'Part' is 5.

Front

What does 'Whole' mean in percent problems?

Back

'Whole' refers to the total amount or quantity. In the apple example, the 'Whole' is 20 apples.

Front

How do you find the whole when given a part and a percent?

Back

Use the formula: Whole = Part / (Percent/100). For example, if the part is 30 and the percent is 60%, the whole is 30 / (60/100) = 50.

Front

What is 25% of 200?

Back

25% of 200 is 50. (0.25 x 200 = 50)

Front

How do you find the percent when given a part and a whole?

Back

Use the formula: Percent = (Part/Whole) x 100. For example, if the part is 30 and the whole is 150, the percent is (30/150) x 100 = 20%.

Front

What is 50% of 80?

Back

50% of 80 is 40. (0.50 x 80 = 40)

Front

How do you express 0.25 as a percent?

Back

0.25 as a percent is 25%. (0.25 x 100 = 25%)