Percent Increase and Error Quiz

Joe’s weekly pay increased from $80 to $100. What is the percent increase in Joe’s weekly pay?

• 40%

• 25%

• 20%

• 10%

John measured the volume of a bottle as 27 ounces. The actual volume of the bottle is 24 ounces. What is John’s approximate percent of error?

• 3%

• 11%

• 13%

• 89%

Hannah estimated that a bottle could hold 2.2 liters. The actual volume of the bottle was 2 liters. What was the Percent error in Hannah’s measurements?

• 0.1%

• 0.2%

• 2%

• 10%

Robert took a math test and got 36 correct and 14 incorrect answers. What was the percentage of correct answers?

• 28%

• 36%

• 50%

• 72%

Bill had a salary of $48,000 last year. This year his salary is $49,920. What is the percent increase in Bill’s salary?

• 2%

• 3%

• 4%

• 5%

Gene measured the length of his bedroom at 14 feet. The actual length is 14.5 feet. What is the approximate percent error?

• 0.5%

• 2.0%

• 3.4%

• 3.6%

A stereo that normally sells for $125 is on sale for $90. By what percent has the price of the stereo been reduced?

• 28%

• 35%

• 39%

• 72%

Alex measured the length of an item to be 3.7 cm. The actual length is 3.5 cm. What is Alex’s percent error?

• 18.5%

• 17.5%

• 5.7%

• 5.4%

The price of a mountain bike is decreased from $150 to $120. By what percent is the price decreased?

• 20%

• 25%

• 30%

• 80%

The value of an investment increased from $750 to $795. By which percentage did the value of the investment increase?

• 94.3%

• 45%

• 6%

• 5.7%