57.81% is the change from 256 to 404
Calculation steps:
[( 404 - 256 ) ÷ 256] x 100 = 57.81%
Formula
Percentage change = [(404 - 256) / 256] x 100
Subtract the new number by the original number
404 - 256 = 148
148 ÷ 256 = 0.578125
0.578125 x 100 = 57.81%