222.75% is the change from 255 to 823
Calculation steps:
[( 823 - 255 ) ÷ 255] x 100 = 222.75%
Formula
Percentage change = [(823 - 255) / 255] x 100
Subtract the new number by the original number
823 - 255 = 568
568 ÷ 255 = 2.227450980392157
2.227450980392157 x 100 = 222.75%