239.06% is the change from 256 to 868
Calculation steps:
[( 868 - 256 ) ÷ 256] x 100 = 239.06%
Formula
Percentage change = [(868 - 256) / 256] x 100
Subtract the new number by the original number
868 - 256 = 612
612 ÷ 256 = 2.390625
2.390625 x 100 = 239.06%