20.93% is the change from 129 to 156
Calculation steps:
[( 156 - 129 ) ÷ 129] x 100 = 20.93%
Formula
Percentage change = [(156 - 129) / 129] x 100
Subtract the new number by the original number
156 - 129 = 27
27 ÷ 129 = 0.20930232558139536
0.20930232558139536 x 100 = 20.93%