28.13% is the change from 256 to 328
Calculation steps:
[( 328 - 256 ) ÷ 256] x 100 = 28.13%
Formula
Percentage change = [(328 - 256) / 256] x 100
Subtract the new number by the original number
328 - 256 = 72
72 ÷ 256 = 0.28125
0.28125 x 100 = 28.13%