-0.12% is the change from 823 to 822
Calculation steps:
[( 822 - 823 ) ÷ 823] x 100 = -0.12%
Formula
Percentage change = [(822 - 823) / 823] x 100
Subtract the new number by the original number
822 - 823 = -1
-1 ÷ 823 = -0.001215066828675577
-0.001215066828675577 x 100 = -0.12%