85.49% is the change from 255 to 473
Calculation steps:
[( 473 - 255 ) ÷ 255] x 100 = 85.49%
Formula
Percentage change = [(473 - 255) / 255] x 100
Subtract the new number by the original number
473 - 255 = 218
218 ÷ 255 = 0.8549019607843137
0.8549019607843137 x 100 = 85.49%