Brianna estimated that she would spend $60 shopping for school supplies before the start of the school year. She actually spent $55. What is the percent error for her estimate? If necessary, round your answer to the nearest tenth of a percent
To calculate the percent error for Brianna's estimate, you can use the formula:
Percent Error = (|Actual Value - Estimated Value| / Actual Value) x 100
In this case:
Actual Value = $55
Estimated Value = $60
|55 - 60| = 5
Therefore,
Percent Error = (5 / 55) x 100
Percent Error = (0.0909) x 100
Percent Error = 9.1%
So, the percent error for Brianna's estimate is 9.1%.