85.16% is the change from 256 to 474
Calculation steps:
[( 474 - 256 ) ÷ 256] x 100 = 85.16%
Formula
Percentage change = [(474 - 256) / 256] x 100
Subtract the new number by the original number
474 - 256 = 218
218 ÷ 256 = 0.8515625
0.8515625 x 100 = 85.16%