Percent Proportions

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 the percent of a number?

Back

To calculate the percent of a number, multiply the number by the percent (as a decimal) and then divide by 100.

Front

What is the formula to find the percent of correct answers on a test?

Back

(Number of correct answers / Total number of questions) x 100.

Front

If Bob answered 6 questions wrong out of 30, how many did he answer correctly?

Back

Bob answered 30 - 6 = 24 questions correctly.

Front

What percent of 30 questions did Bob get correct if he answered 24 correctly?

Back

(24 / 30) x 100 = 80%.

Front

How do you find the amount spent as a percent of total money?

Back

(Amount spent / Total money) x 100.

Front

If Sam received $125 and spent $85, how much did he save?

Back

Sam saved $125 - $85 = $40.

Front

What percent of Sam's birthday money did he spend at the store?

Back

($85 / $125) x 100 = 68%.

Front

How do you calculate sales tax on a purchase?

Back

Sales tax = Purchase price x Sales tax rate (as a decimal).

Front

If a shirt costs $20 and the sales tax is 15%, what is the total cost?

Back

Total cost = $20 + ($20 x 0.15) = $23.