49.61% is the change from 256 to 383
Calculation steps:
[( 383 - 256 ) ÷ 256] x 100 = 49.61%
Formula
Percentage change = [(383 - 256) / 256] x 100
Subtract the new number by the original number
383 - 256 = 127
127 ÷ 256 = 0.49609375
0.49609375 x 100 = 49.61%