820 and 420 percent error (%)
Use this calculator when comparing a experimental value to a theoretical value. We think you reached us looking for answers to questions like: 1) What is the percent error supposing 420 as the measured value and 820 as the calculated value? 2) What is the absolute error between 820 and 420 supposing 820 as the theoretical value? Or may be: 820 and 420 percent error (%) 



See the solutions to these problems just after the Percent Error Calculator below. 



How to calculate Percent Error  Step by Step SolutionThe Percent Error Calculator uses this formula:
The terms "Experimental" and "Theoretical" used in the equation above are commonly replaced with similar terms. Some terms also used for experimental are "measured," "calculated," or "actual" and for theoretical the terms "accepted" and "calculated" are frequently used. Here are the solutions to the questions stated above:1) What is the percent error supposing 420 as the measured value and 820 as the calculated value?Use the above formula to find the percent error. So, replacing the given values, we havePercent error = [(420  820) / 820] x 100 = (400 / 820) x 100 = 48.780487804878 % (negative error) In this case we have a % of negative error because the experimental is smaller than the theoretical. 2) What is the absolute error between 820 and 420 considering 820 as the theoretical value?This problem is not about percent or relative error, but about absolute error. The solution is very simple:Absolute error, or error = Experimental  Theoretical = 420  820 = 400 (negative error) 



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