48.83% is the change from 256 to 381
Calculation steps:
[( 381 - 256 ) ÷ 256] x 100 = 48.83%
Formula
Percentage change = [(381 - 256) / 256] x 100
Subtract the new number by the original number
381 - 256 = 125
125 ÷ 256 = 0.48828125
0.48828125 x 100 = 48.83%