Percent, Percent Change and Percent Error

Ms. Brown estimated 70 students would try out for the Cross Country team. This year, only 63 students tried out. What was her percent error?

• 11%

• 50%

• 12%

• 1%

Mrs. Banks bought a car for $25,000 and sold it 5 years later for $16,000. Find the percent decrease for the price of the car.

• 36%

• 9%

• 34%

• 26%

Find the percent of change. Round to the nearest tenth of a percent.

From $18.50 to $22.10

• 19.5% increase

• 16.3%

• 16.2%

• 19.6%

Find the percent error. Round to the nearest tenth of a percent.

Actual speed: 38 mph

Estimated speed: 35 mph

• 8.1%

• 0.79%

• 7.9%

• 6.8%

Find the percent error. Round to the nearest tenth of a percent.

Estimated length: 32 in.

Actual length: 54 in.

• 27.4%

• 70.4%

• 41.8%

• 40.7%

Find the percent of change. Round to the nearest tenth of a percent.

From 53 words to 62 words

• 14.5% increase

• 16.9% increase

• 17.0% increase

• 85% increase

During May, Javier swims 80 laps each weekday. During June he swims 60 laps each weekday. What is the percent of change from May to June? Is it an increase or decrease?

• 25% increase

• 25% decrease

• 75% increase

• 75% decrease

Alex buys an antique car for $45,800, restores it, and then sells it for $61,830. Find the percent of change. Is it an increase or a decrease?

• 35% increase

• 35% decrease

• 65% increase

• 65% decrease

Of 120 owners of reptiles surveyed, 27 own snakes as pets. What percent of the reptile owners own snakes as pets?

• 35%

• 25%

• 24.5%

• 22.5%

The number of people signed up for a bus trip increased from 32 to 45. What is the percent increase? Round to the nearest percent.

• 52%

• 41%

• 42%

• 45%