text: in calculating % error, do you use the smallest division or half the smallest value divided by measurementx100 in calculating % error, do you use the smallest division or half the smallest value divided by measurement x 100  % error  =  error             _ ___________    x 100              measurement normally to calculate percent error in statistics, you use the standard deviation.    for simple math:  % error = error x 100 example: given % error = 75% then error = 0.75 75% = 0.75 x 100  not totally sure what your exactly asking.