53.13% is the change from 256 to 392
Calculation steps:
[( 392 - 256 ) ÷ 256] x 100 = 53.13%
Formula
Percentage change = [(392 - 256) / 256] x 100
Subtract the new number by the original number
392 - 256 = 136
136 ÷ 256 = 0.53125
0.53125 x 100 = 53.13%