Percent, Percent of Change, Percent of Error

Calculate the percent increase. Round to the nearest percent.

Original: 45

New: 92

16 is what percent of 80?

Calculate the percent increase. Round to the nearest percent.

Original: 74

New: 85

The regular price of a scooter is $65.50. It is on sale for $52.40. What is the percent decrease from the regular price to the sale price of the scooter?

What is the percent change when a quantity increases from 100 to 150?

Calculate the percent change from 50 to 75.

Fifty-two of 80 marbles are red. What percent of the marbles are red?

The student council estimated that they would have 250 people attend the homecoming dance. The number of people who attended was 315. What is the percent of error to the nearest hundredth percent? Type the answer in the blank up to the hundredth place value.

A study reported that 15% of toddlers have food allergies. If 14,500 parents of toddlers were polled, how many parents made this claim?

Of the 125 songs on Brad’s playlist, 18 were recorded in the 1980s. Eighteen is what percent of 125?