208.59% is the change from 256 to 790
Calculation steps:
[( 790 - 256 ) ÷ 256] x 100 = 208.59%
Formula
Percentage change = [(790 - 256) / 256] x 100
Subtract the new number by the original number
790 - 256 = 534
534 ÷ 256 = 2.0859375
2.0859375 x 100 = 208.59%