Percent Change/Error

Alexis has a cell phone that cost $65. She recently bought a new phone that cost $79. What was the percent increase in the prices of the phone?

• 14%

• 21.5%

• 17.7%

• 82.3%

Kevin bought a used guitar at a garage sale for $150. He fixed it up and sold it for $200. What was the percent increase?

• 75%

• 25%

• 50%

• 33.3%

Elle earned $45 last month babysitting. This month she earned $35. What is the percent decrease?

• 22.2%

• 10%

• 77.8%

• 28.6%

Ray predicted that he would score 16 points during the basketball game. He only scored 12 points. What was his percent error?

• 4%

• 75%

• 25%

• 33%

Ainsley thought there were 25 students in her math class, but there were actually 27 students. What is her percent error?

• 7.4%

• 8%

• 92.6%

• 2%

Trent told his friends it would take him 90 minutes to mow the lawn. It only took him 75 minutes. What is his percent error?

• 16.7%

• 15%

• 20%

• 83.3%