125% is the change from 256 to 576
Calculation steps:
[( 576 - 256 ) ÷ 256] x 100 = 125%
Formula
Percentage change = [(576 - 256) / 256] x 100
Subtract the new number by the original number
576 - 256 = 320
320 ÷ 256 = 1.25
1.25 x 100 = 125%
Example