Percent Error Practice

Front

What is percent error?

Back

Percent error is a measure of how inaccurate a measurement is, expressed as a percentage of the difference between the estimated value and the actual value.

Front

How do you calculate percent error?

Back

Percent error = |(Estimated Value - Actual Value)| / Actual Value × 100%.

Front

Rogelio ate 2/5 of a pizza. What percent of a pizza did he eat?

Back

40%

Front

Sam thinks the cost of the book is $50, but actually it's $56. What is Sam's percent of error?

Back

10.7%

Front

Bob estimates that there will be 230 people who attend the concert. There was an actual total of 300 people who attended. Find the percent error.

Back

23%

Front

Jessie estimates the weight of her cat to be 8 pounds. The actual weight of the cat was 10 pounds. Find the percent error.

Back

20%

Front

Nick estimated that 60 people would come to eat, but only 45 attended. Whats the % of error?

Back

33%

Front

What is the formula for calculating the estimated value?

Back

Estimated Value = Actual Value ± (Percent Error × Actual Value).

Front

If the actual value is 100 and the percent error is 10%, what is the estimated value?

Back

Estimated Value = 100 ± (10% × 100) = 90 or 110.

Front

What does a percent error of 0% indicate?

Back

A percent error of 0% indicates that the estimated value is exactly equal to the actual value.