When Percent Equal 100%
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If it's high that means it's very off and away from the actual value. If you find a low percent error it is very close or close to the true value.
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Yes, your percent error can be over 100%. This means that somewhere during your experiment you made a big error.
what is the number supposed to be if you git 7 cm? Percent error is the percentage that you're incorrect by, so you need another measurement. to do it, you find the difference and then divide by the original so (7-x)/true value then multiply by 100 to get percentage.
Divide the calculated or estimated error by the magnitude of the measurement. Take the absolute value of the result, that is, if it is negative, convert to positive. This would make the percent error = | error / measurement |.