801.41% is the change from 71 to 640
Calculation steps:
[( 640 - 71 ) ÷ 71] x 100 = 801.41%
Formula
Percentage change = [(640 - 71) / 71] x 100
Subtract the new number by the original number
640 - 71 = 569
569 ÷ 71 = 8.014084507042254
8.014084507042254 x 100 = 801.41%