32.56% is the change from 129 to 171
Calculation steps:
[( 171 - 129 ) ÷ 129] x 100 = 32.56%
Formula
Percentage change = [(171 - 129) / 129] x 100
Subtract the new number by the original number
171 - 129 = 42
42 ÷ 129 = 0.32558139534883723
0.32558139534883723 x 100 = 32.56%