-2.84% is the change from 844 to 820
Calculation steps:
[( 820 - 844 ) ÷ 844] x 100 = -2.84%
Formula
Percentage change = [(820 - 844) / 844] x 100
Subtract the new number by the original number
820 - 844 = -24
-24 ÷ 844 = -0.02843601895734597
-0.02843601895734597 x 100 = -2.84%