Finding Percent of a Number

Front

What is a percent?

Back

A percent is a way of expressing a number as a fraction of 100. It is denoted by the symbol '%'. For example, 20% means 20 out of 100.

Front

How do you find 20% of a number?

Back

To find 20% of a number, multiply the number by 0.20 (which is the decimal form of 20%). For example, 20% of 50 is 50 x 0.20 = 10.

Front

What is the formula to calculate the percent of a number?

Back

The formula to calculate the percent of a number is: (Percent / 100) x Total Number.

Front

If 20% of a class of 30 students are absent, how many students are absent?

Back

6 students. (30 x 0.20 = 6)

Front

How do you calculate the amount saved when an item is on sale?

Back

To calculate the amount saved, multiply the original price by the discount percentage (in decimal form). For example, if an item costs $50 and is 20% off, the savings are $50 x 0.20 = $10.

Front

What is the relationship between fractions and percentages?

Back

Fractions can be converted to percentages by multiplying the fraction by 100. For example, 1/4 = 0.25 = 25%.

Front

How do you find the total number when given a part and its percent?

Back

To find the total number, divide the part by the percent (in decimal form). For example, if 20 is 25% of a number, the total number is 20 / 0.25 = 80.

Front

If a student answered 15 out of 20 questions correctly, what percent did they get right?

Back

75%. (15/20 = 0.75, and 0.75 x 100 = 75%)

Front

What does it mean if a team lost 30% of their games?

Back

It means that 30 out of every 100 games they played were losses. If they played 50 games, they lost 15 games (50 x 0.30 = 15).

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, 45% as a decimal is 0.45.