218.82% is the change from 255 to 813
Calculation steps:
[( 813 - 255 ) ÷ 255] x 100 = 218.82%
Formula
Percentage change = [(813 - 255) / 255] x 100
Subtract the new number by the original number
813 - 255 = 558
558 ÷ 255 = 2.1882352941176473
2.1882352941176473 x 100 = 218.82%