39.22% is the change from 255 to 355
Calculation steps:
[( 355 - 255 ) ÷ 255] x 100 = 39.22%
Formula
Percentage change = [(355 - 255) / 255] x 100
Subtract the new number by the original number
355 - 255 = 100
100 ÷ 255 = 0.39215686274509803
0.39215686274509803 x 100 = 39.22%