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.

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 if 60% of a group are a certain type?

Back

It means that out of every 100 members of the group, 60 are that type.

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the top number (numerator) by the bottom number (denominator) and then multiply by 100.

Front

If 3 out of 5 cars are black, what percent of the cars are black?

Back

60% (3 divided by 5 equals 0.6, and 0.6 times 100 equals 60).

Front

If there are 36 boys on a bus and 60% are girls, how many total students are there?

Back

90 students (36 boys is 40% of the total, so 100% is 36 divided by 0.4).

Front

What is a discount?

Back

A discount is a reduction in the price of an item, often expressed as a percentage.

Front

How do you find the amount saved with a discount?

Back

To find the amount saved, multiply the original price by the discount percentage (as a decimal). For example, for a $65 item with a 20% discount, calculate 65 x 0.20 = $13.

Front

What percent of a class are men if there are 32 students and 9 are women?

Back

71.9% (There are 23 men, so 23 divided by 32 equals 0.71875, which is 71.9% when rounded).

Front

What is the sales price if an item is 20% off?

Back

The sales price is 80% of the original price (100% - 20% = 80%).