Percent of a Number

Front

What is a percent?

Back

A percent is a way to express a number as a fraction of 100. It is often used to compare ratios and proportions.

Front

How do you calculate the percent of a number?

Back

To calculate the percent of a number, multiply the number by the percent (as a decimal). For example, to find 20% of 50, calculate 50 x 0.20 = 10.

Front

What does it mean to find the percent of a total?

Back

Finding the percent of a total means determining how much a certain portion represents out of the whole, expressed as a percentage.

Front

If 60% of a group of 50 people like pizza, how many people like pizza?

Back

30 people like pizza (50 x 0.60 = 30).

Front

If 25% of a class of 40 students are absent, how many students are absent?

Back

10 students are absent (40 x 0.25 = 10).

Front

What is the formula to find the number of people who do not meet a percentage?

Back

To find the number of people who do not meet a percentage, subtract the number who meet the percentage from the total. For example, if 60% of 100 people meet a criteria, then 40% do not, which is 40 people.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide the percentage by 100. For example, 75% becomes 0.75.

Front

If 75% of 200 students passed a test, how many students passed?

Back

150 students passed (200 x 0.75 = 150).

Front

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

Back

Percentages, fractions, and decimals are different ways to represent the same value. For example, 50% = 0.50 = 1/2.

Front

If 30% of a number is 45, what is the number?

Back

The number is 150 (45 ÷ 0.30 = 150).