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# What is the percent error?

What is the percent error for a mass measure-

ment of 15.2 g, given that the correct value is

21.9 g? Answer in units of %

### 4 Answers

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- EmmaLv 41 decade agoBest answer
The absolute value of (Experimental - Actual) / Actual

Then multiply by 100

abs(15.2-21.9) = 6.7

6.7/21.9 = .3059

0.3059 x 100 = 30.6%

This is a relatively high percent error, so if you are writing a report be sure to add possible sources of error (human error, etc.).

- 1 decade ago
The formula is percent error= measured value-accepted value / accepted value x 100.

percent error= 15.2-21.9/21.9 x 100

percent error=-30.5= -31%

You can't have a negative % error, so it is 31% error.

Source(s): 11th grade high school Chemistry student. I have a 84 and named Student of the Month.

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