Absolute error V true - V observed. The resultant obtained by putting value in the percentage error formula is known as perfect error. The formula looks like this.
Displaystyle text MPE frac 100 nsum _ t1 n frac a_ t-f_ t a_ t where at is the actual value of the quantity being forecast ft is the forecast and n is the number of different times for which the variable is forecast.
The resultant obtained by putting value in the percentage error formula is known as perfect error. The theoretical value using physics formulas is 064 seconds. The formula for percent error is. With both values you can start solving for the percent error using the percent error formula.