38.67% is the change from 256 to 355
Calculation steps:
[( 355 - 256 ) ÷ 256] x 100 = 38.67%
Formula
Percentage change = [(355 - 256) / 256] x 100
Subtract the new number by the original number
355 - 256 = 99
99 ÷ 256 = 0.38671875
0.38671875 x 100 = 38.67%