A standard mass of 150 g was placed on a balance scale. The balance said the mass was 151.3 g. What is the percent error of the balance? Round to the nearest hundredth of a percent.

Answer 1

So to find the percent error, first you calculate the error, which is how off the balance is or 151.3g - 150g. We get an error of 1.3g. Next you divide the error by the expected value. We were expecting the mass to be 150g. So the percent error is 1.3g / 150g x 100% = .867%