Percent Change and Error

What is the correct Percent Change equation?

Percent of change = _____

Percent Error = ______

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

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%

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

A sweater is $43. It is on sale for 20% off. What is the final price?

• $47
• $34.40
• $23
• $8.60

A shoe sales associate earned $300 in August. In September she earned 8% more than she did in August. How much did she earn in September?

• $308
• $324
• $200
• $380

An Ipad that costs $500 is on sale for 15% off. Then has a 6% tax. What's the final price?

• $450.50
• $521
• $491
• $400