88.24% is the change from 136 to 256
Calculation steps:
[( 256 - 136 ) ÷ 136] x 100 = 88.24%
Formula
Percentage change = [(256 - 136) / 136] x 100
Subtract the new number by the original number
256 - 136 = 120
120 ÷ 136 = 0.8823529411764706
0.8823529411764706 x 100 = 88.24%