Percent of Change and Error

Chesnie was 50 inches to start the school year and is now 55 inches. What is her percent of change to nearest whole number?

• 5 % INCREASE

• 10 % INCREASE

• 9 % INCREASE

• 91 % INCREASE

Wes scored 30 points in his video game yesterday and today he scored 24 points. What is his percent change?

• 6 % INCREASE

• 25 % INCREASE

• 20 % INCREASE

• 80 % INCREASE

Jake estimated a tree to be 80 inches tall and it is actually 92 inches tall. What is his percent of error?

• 13 %

• 15 %

• 20 %

• 10 %

Ariadna guessed that there were 43 gummy worms in a bag and there were 38 in the bag. What is her percent of error to nearest whole percent?

• 5 %

• 12 %

• 13 %

• 88 %

You estimate that you sent 135 texts last week but when you get the bill it was actually 108. 

• 20%

• 25%

• 30%

• 18%

You guessed that the Chicago Cubs would win 95 games during the regular season. They actually won 103. What was your percent error? Round to the nearest tenth if necessary.

• 7.8%

• 7.7%

• 0.77%

• 0.78%

You guessed that there were 256 gumballs in the jar. There were actually 510. Find your percent error. Round to the nearest tenth if necessary.

• 49.8%

• 49.9%

• 50.2%

• 50.3%

The distance around a neighborhood is 6 miles. When Sam clocked it with an odometer, the distance was 5.52 miles.

What is the percent error of the clocking?

• 10%

• 6.5%

• 7%

• 8%

Isaiah scored 12 points in his first basketball game and in his third game he scored 18 points. What is his percent change?

• 6 %

• 50 %

• 33 %

• 100 %

The student council estimated that they would have 250 people attend the homecoming dance. The number of people who attended was 315. What is the percent of error to the nearest hundredth percent? Type the answer in the blank up to the hundredth place value.

Mathematical Equivalence

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