87.45% is the change from 255 to 478
Calculation steps:
[( 478 - 255 ) ÷ 255] x 100 = 87.45%
Formula
Percentage change = [(478 - 255) / 255] x 100
Subtract the new number by the original number
478 - 255 = 223
223 ÷ 255 = 0.8745098039215686
0.8745098039215686 x 100 = 87.45%