Question

Mrs. Williams estimates that she will spend $65 onschool supplies. She actually spends $73. What is thepercent error? Round to the nearest tenth ifnecessary.

Answer 1

We can calculate the percent error as the absolute difference between the predicted value ($65) and the actual value ($73) divided by the actual value and multiplied by 100%.

This can be written as:

`e=(|p-a|)/(a)\cdot100\%=(|65-73|)/(73)\cdot100\%=(8)/(73)\cdot100\%\approx11.0\%`

Answer: the percent error is approximately 11.0%