-2.49% is the change from 843 to 822
Calculation steps:
[( 822 - 843 ) ÷ 843] x 100 = -2.49%
Formula
Percentage change = [(822 - 843) / 843] x 100
Subtract the new number by the original number
822 - 843 = -21
-21 ÷ 843 = -0.02491103202846975
-0.02491103202846975 x 100 = -2.49%