102.38% is the change from 126 to 255
Calculation steps:
[( 255 - 126 ) ÷ 126] x 100 = 102.38%
Formula
Percentage change = [(255 - 126) / 126] x 100
Subtract the new number by the original number
255 - 126 = 129
129 ÷ 126 = 1.0238095238095237
1.0238095238095237 x 100 = 102.38%