56.64% is the change from 256 to 401
Calculation steps:
[( 401 - 256 ) ÷ 256] x 100 = 56.64%
Formula
Percentage change = [(401 - 256) / 256] x 100
Subtract the new number by the original number
401 - 256 = 145
145 ÷ 256 = 0.56640625
0.56640625 x 100 = 56.64%