# Percent error?

if i have a value 396.3 and the actual was 330, calculate percent error showing work?thanks:D

### 6 Answers

- 1 decade agoFavorite Answer
theoretical - actual / actual * 100% = % error

(396.3 - 330)/330 = 0.200909091

0.200909091 * 100 = 20.09% error

Source(s): Biology major at UC Berkeley - 1 decade ago
It's the difference of the two divided by expected. Then the quotient is multiplied by 100.

396.3-330=66.3

66.3/330=0.2009

0.2009 x 100=20%

- balliewLv 43 years ago
No. % errors is the proportion of a volume that is simply by errors: calculated as |errors/fee|x100%. The % distinction is the proportion by employing which 2 parts variety: calculated as |(a-b)/b|x a hundred% with a being an experimental fee and b being a envisioned fee. besides the fact that if, each at times the type between the two parts is used as a crude approximation for the errors, wherein case the two could have an identical fee, yet are nonetheless no longer technically an identical component.

- 1 decade ago
First, you take the difference of your value and the actual value, 396.3-330 = 66.3

Then you take that difference and divide it by the actual value : 66.3/330 = .20

so the % error is 20%

Hope this helps :D

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- 1 decade ago
formula is guessed-actual/actual x 100 if you want the simple equation to do ant future calculations