Final answer:
To find the percent error, use the formula: Percent Error = (|Measured Value - Actual Value| / Actual Value) * 100%. In this case, Brian's measured value is 80 and his actual value is 95, resulting in a percent error of 15.79%.
Step-by-step explanation:
To find the percent error, we use the formula:
Percent Error = (|Measured Value - Actual Value| / Actual Value) * 100%
In this case, Brian's measured value is 80 and his actual value is 95. So the percent error is:
Percent Error = (|80 - 95| / 95) * 100%
Percent Error = (|-15| / 95) * 100%
Percent Error = (15 / 95) * 100%
Percent Error = 0.1579 * 100%
Percent Error = 15.79%