-68.86% is the change from 822 to 256
Calculation steps:
[( 256 - 822 ) ÷ 822] x 100 = -68.86%
Formula
Percentage change = [(256 - 822) / 822] x 100
Subtract the new number by the original number
256 - 822 = -566
-566 ÷ 822 = -0.6885644768856448
-0.6885644768856448 x 100 = -68.86%