103.17% is the change from 126 to 256
Calculation steps:
[( 256 - 126 ) ÷ 126] x 100 = 103.17%
Formula
Percentage change = [(256 - 126) / 126] x 100
Subtract the new number by the original number
256 - 126 = 130
130 ÷ 126 = 1.0317460317460319
1.0317460317460319 x 100 = 103.17%