221.09% is the change from 256 to 822
Calculation steps:
[( 822 - 256 ) ÷ 256] x 100 = 221.09%
Formula
Percentage change = [(822 - 256) / 256] x 100
Subtract the new number by the original number
822 - 256 = 566
566 ÷ 256 = 2.2109375
2.2109375 x 100 = 221.09%