81.69% is the change from 71 to 129
Calculation steps:
[( 129 - 71 ) ÷ 71] x 100 = 81.69%
Formula
Percentage change = [(129 - 71) / 71] x 100
Subtract the new number by the original number
129 - 71 = 58
58 ÷ 71 = 0.8169014084507042
0.8169014084507042 x 100 = 81.69%