Question

Arianna measured a line to be 9.9 inches long. If the actual length of the line is 7.8 inches, then what was the percent error of the measurement, to the nearest tenth of a percent?

Answer 1

Theoretical value:75
Observed value:100

Answer 2

Answer: 26.9%

Explanation:

9.9-7.8=2.1

(2.1/ 7.8) •100=26.9