88.97% is the change from 136 to 257
Calculation steps:
[( 257 - 136 ) ÷ 136] x 100 = 88.97%
Formula
Percentage change = [(257 - 136) / 136] x 100
Subtract the new number by the original number
257 - 136 = 121
121 ÷ 136 = 0.8897058823529411
0.8897058823529411 x 100 = 88.97%