15.44% is the change from 136 to 157
Calculation steps:
[( 157 - 136 ) ÷ 136] x 100 = 15.44%
Formula
Percentage change = [(157 - 136) / 136] x 100
Subtract the new number by the original number
157 - 136 = 21
21 ÷ 136 = 0.15441176470588236
0.15441176470588236 x 100 = 15.44%