85.55% is the change from 256 to 475
Calculation steps:
[( 475 - 256 ) ÷ 256] x 100 = 85.55%
Formula
Percentage change = [(475 - 256) / 256] x 100
Subtract the new number by the original number
475 - 256 = 219
219 ÷ 256 = 0.85546875
0.85546875 x 100 = 85.55%