58.59% is the change from 256 to 406
Calculation steps:
[( 406 - 256 ) ÷ 256] x 100 = 58.59%
Formula
Percentage change = [(406 - 256) / 256] x 100
Subtract the new number by the original number
406 - 256 = 150
150 ÷ 256 = 0.5859375
0.5859375 x 100 = 58.59%