0.39% is the change from 254 to 255
Calculation steps:
[( 255 - 254 ) ÷ 254] x 100 = 0.39%
Formula
Percentage change = [(255 - 254) / 254] x 100
Subtract the new number by the original number
255 - 254 = 1
1 ÷ 254 = 0.003937007874015748
0.003937007874015748 x 100 = 0.39%