Work out Percent Error
Use the accepted value as the reference. The absolute difference keeps the error non-negative.
Formula: Percent Error = |Experimental β Accepted| Γ· |Accepted| Γ 100
Use exact values where the method requires them, then round only at the final step when possible. Early rounding can slightly change the displayed answer.
The formula provides a direct way to verify the result without relying on a second calculator.