percentage measurement accuracy as a percentage Measurement accuracy refers to how close a measured value is to the true or accepted value of the quantity being measured. It is a percentage in which the numerator represents the absolute value of one minus the difference between the true value and the observed value, and the denominator represents the true value. Accuracy is often expressed as a percentage of the true value, based on the relative error: Accuracy (%)= (1 −∣Measured Value−True Value∣/True Value)×100 True Value: The reference or accepted value. Measured Value: The value obtained during the measurement. Brian S. Alper, Harold Lehmann, Muhammad Afzal, Joanne Dehnbostel requires discussion