226.56% is the change from 256 to 836
Calculation steps:
[( 836 - 256 ) ÷ 256] x 100 = 226.56%
Formula
Percentage change = [(836 - 256) / 256] x 100
Subtract the new number by the original number
836 - 256 = 580
580 ÷ 256 = 2.265625
2.265625 x 100 = 226.56%