Percent of Change and Error

Your teacher estimated that 74 students did their homework and only 60 of them had. What was your teacher's percent of error?

• 19 %

• 23 %

• 14 %

• 81 %

Mason was cleaning the shed for his parents. He estimated that there were 45 Mason jars in the shed. When he counted he found that there were 63. What was his percent of error?

• 29 %

• 18 %

• 40 %

• 71 %

Mia is getting married. She estimates that she will have 150 guests at her wedding. The day of her wedding the caterer told her there were 142 people in attendance. What is her percent error?

• 7 %

• 8 %

• 5 %

• 6 %

Bob hadn't weighed himself in awhile. He estimated he weighed 122 pounds but when he got on the scale, his weight was 138 pounds. What is Bob's percent of error to nearest whole number?

• 13 %

• 12 %

• 15 %

• 16 %

Question 15 - After a stressful day, you go home to take a nap. You estimated you slept for 20 minutes but your Mom told you slept for 45 minutes. What is your percent of error?

• 125 %

• 25 %

• 56 %

• 100 %

Anjay wasn't sure about an answer on his Science Test. He guessed 84 degrees was the answer and the correct answer was 94 degrees. What is his percent of error?

• 89 %

• 12 %

• 11 %

• 10 %

Last month, the online price of a powered ride-on car was $250. This month, the online price is $330. What is the percent of increase for the price of the car?

• 20%

• 25%

• 30%

• 32%

When Ricardo was 9 years old, he was 56 inches tall. Ricardo is now 12 years old and he is 62 inches tall. Find the percent of increase in Ricardo’s height to the nearest tenth.

• 10.7%

• 9.3%

• 8.5%

• 7.1%

Doug estimates that his soccer team will win 7 games this year. The team actually wins 10 games. What is the percent error of Doug’s estimate? Round the answer to the nearest tenth percent, if necessary.

• 30%

• 42.9%

• 50%

• 70%

Oliver estimates the weight of his cat to be 16 pounds. The actual weight of his cat is 14.25 pounds. What is the percent error of Oliver’s estimate rounded to the nearest tenth of a percent?

• 12.3%

• 10.9%

• 11.5%

• 13.2%