For Calculating Error Percentage While Working

For Calculating Error Percentage While Working

Percentage error is referred to the value which is the difference between the measured value and the actual value. We use it in the science projects to determine the difference between the experimental values and the expected or actual values. The formula stating the error would be

(Experimental value – Expected value) / Expected value = error
And the percentage error is
%age error = error x 100

Following are the steps to calculate the percentage error-

1. Calculate the experimental value through your particular experiment.

2. Check the expected or actual value for that experiment.

3. If both the value matches, then there is no error, but if not, then you have to calculate by using this formula.

Make sure that the values should be properly noted down. Values can be either positive or negative, and same applies for the error too.

For Calculating Error Percentage While Working

“Percentage error” or “percent error” is the difference between the estimated number or guessed number and the actual number when compared with the actual number expressed in percent format. It is an expression of the difference between a measured value and the known or accepted value. It is frequently used in science to report the difference between expected values and experimental values.

The following image shows the formula how to calculate the percentage error:

Note: sometimes it is helpful to know if the error is positive or negative. If you need to know the positive or negative error, you can do this by dropping the absolute value brackets in the formula. But, most of the time, absolute error is fine. To calculate the percent error using the formula:

1. Subtract the accepted value from the experimental value.
2. Get the absolute value from step 1.
3. Divide that answer or value by the accepted value.
4. Multiply that answer by 100 and add the % symbol to express the answer as percentage.

Percentage error is a method to analyze how successful an experiment was and is used in many physical sciences like in chemistry and physics experiments.