84.31% is the change from 255 to 470
Calculation steps:
[( 470 - 255 ) ÷ 255] x 100 = 84.31%
Formula
Percentage change = [(470 - 255) / 255] x 100
Subtract the new number by the original number
470 - 255 = 215
215 ÷ 255 = 0.8431372549019608
0.8431372549019608 x 100 = 84.31%