Percent Proportions Review #1

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 percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 20% of 50, calculate 50 * 0.20 = 10.

Front

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

Back

The formula is: Whole = Part / (Percent / 100). For example, if 20 is 25% of a number, the whole is 20 / 0.25 = 80.

Front

What is the relationship between part, whole, and percent?

Back

The relationship can be expressed as: Percent = (Part / Whole) * 100.

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and multiply by 100. For example, 1/4 = (1 ÷ 4) * 100 = 25%.

Front

What is 20% of 102?

Back

20.4

Front

78 is what percent of 450?

Back

17%.

Front

What is 23% of 65?

Back

14.95

Front

If 18 is 20% of a number, what is the number?

Back

The number is 90.

Front

What proportion shows how to find the answer to '18 is what percent of 20'?

Back

Proportion: (Part / Whole) = (Percent / 100). Here, it would be (18 / 20) = (Percent / 100).