86.72% is the change from 256 to 478
Calculation steps:
[( 478 - 256 ) ÷ 256] x 100 = 86.72%
Formula
Percentage change = [(478 - 256) / 256] x 100
Subtract the new number by the original number
478 - 256 = 222
222 ÷ 256 = 0.8671875
0.8671875 x 100 = 86.72%