32.03% is the change from 256 to 338
Calculation steps:
[( 338 - 256 ) ÷ 256] x 100 = 32.03%
Formula
Percentage change = [(338 - 256) / 256] x 100
Subtract the new number by the original number
338 - 256 = 82
82 ÷ 256 = 0.3203125
0.3203125 x 100 = 32.03%