229.02% is the change from 255 to 839
Calculation steps:
[( 839 - 255 ) ÷ 255] x 100 = 229.02%
Formula
Percentage change = [(839 - 255) / 255] x 100
Subtract the new number by the original number
839 - 255 = 584
584 ÷ 255 = 2.2901960784313724
2.2901960784313724 x 100 = 229.02%