125.39% is the change from 256 to 577
Calculation steps:
[( 577 - 256 ) ÷ 256] x 100 = 125.39%
Formula
Percentage change = [(577 - 256) / 256] x 100
Subtract the new number by the original number
577 - 256 = 321
321 ÷ 256 = 1.25390625
1.25390625 x 100 = 125.39%