Percents, Percents, Percents!!

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 12% of 40, calculate 40 * 0.12 = 4.8.

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 26 is 5% of a number, the number is 26 / 0.05 = 520.

Front

How do you find the percent change?

Back

Percent Change = ((New Value - Old Value) / Old Value) * 100. For example, if students increased from 27 to 30, Percent Change = ((30 - 27) / 27) * 100 = 11%.

Front

What is 75% of 64?

Back

75% of 64 is 48. (64 * 0.75 = 48)

Front

How do you calculate a tip based on a percentage?

Back

To calculate a tip, multiply the total bill by the tip percentage (in decimal form). For example, for a $6.68 bill and a 23% tip, calculate 6.68 * 0.23 = 1.54.

Front

What does it mean if a number is a certain percent of another number?

Back

It means that the first number is that fraction of the second number. For example, if 26 is 5% of a number, it means 26 is 5 out of every 100 parts of that number.

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 = 0.25 * 100 = 25%.

Front

What is the relationship between decimals and percents?

Back

Decimals and percents are two ways of expressing the same value. To convert a decimal to a percent, multiply by 100. For example, 0.5 = 50%.

Front

What is the percent of a number that is equal to itself?

Back

100%. A number is 100% of itself.