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 percent of a number?

Back

To calculate a percent of a number, multiply the number by the percent (as a decimal). For example, 90% of 50 is 50 * 0.90 = 45.

Front

What is the formula for finding the unit rate?

Back

The unit rate is found by dividing the total quantity by the number of units. For example, if you spend $40 on 5 pounds of concrete, the unit rate is $40 ÷ 5 = $8 per pound.

Front

How do you find the cost per item?

Back

To find the cost per item, divide the total cost by the number of items. For example, $279 for 9 concert tickets means each ticket costs $279 ÷ 9 = $31.

Front

What is sales tax?

Back

Sales tax is a percentage added to the price of goods and services. It is calculated based on the original price.

Front

How do you calculate sales tax?

Back

To calculate sales tax, multiply the price of the item by the sales tax rate (as a decimal). For example, for a $0.80 pack of gum with a 5% tax, the tax is $0.80 * 0.05 = $0.04.

Front

What does 'unit rate' mean?

Back

Unit rate refers to a quantity measured per one unit of another quantity. It helps compare different rates.

Front

How do you convert a percent to a decimal?

Back

To convert a percent to a decimal, divide by 100. For example, 25% becomes 0.25.

Front

What is the relationship between fractions and percents?

Back

Percents can be expressed as fractions. For example, 50% is equivalent to 1/2.

Front

How do you find the total from a percent?

Back

To find the total from a percent, divide the part by the percent (as a decimal). For example, if 45 is 90%, the total is 45 ÷ 0.90 = 50.