Question

Kevin measured a line to be 12.4 inches long. If the actual length of the line is 15.7 inches, then what was the percent error of the measurement, to the nearest tenth of a percent?

Answer 1

The percent error of the measurement, to the nearest tenth of a percent is
`21.0\%`

Explanation:

Estimated length of a line = 12.4 inches

Actual length of the line = 15.7 inches

Error = 15.7 - 12.4 = 3.3 inches

Percent error of the measurement
`=(3.3)/(15.7)(100)=21.02` ≈ 21.0

So, the percent error of the measurement, to the nearest tenth of a percent is
`21.0\%`