Percent Proportion

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 30% of 20, calculate 20 x 0.30 = 6.

Front

What does it mean if a number is 80% of another number?

Back

It means that the first number is 80 out of 100 parts of the second number. For example, if 20 is 80% of a number, that number is 25.

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 then multiply by 100. For example, 15/25 = 0.6, which is 60%.

Front

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

Back

The formula is: Total = Part / (Percent / 100). For example, if 6 is 30% of a total, then Total = 6 / (30 / 100) = 20.

Front

If Sarah earns $20 a day and spends 30% of it, how much does she spend?

Back

Sarah spends $6.

Front

What percent of 20 is 3?

Back

To find the percent, use the formula: (Part/Whole) x 100. So, (3/20) x 100 = 15%.

Front

If 15 out of 25 boys chose to go swimming, what percent is that?

Back

60% of the boys chose to go swimming.

Front

How do you find what percent one number is of another?

Back

Use the formula: (Part/Whole) x 100. For example, to find what percent 20 is of 25, calculate (20/25) x 100 = 80%.

Front

What is the relationship between fractions, decimals, and percents?

Back

Fractions, decimals, and percents are different ways to represent the same concept of a part of a whole. For example, 1/2 = 0.5 = 50%.