-16.83% is the change from 820 to 682
Calculation steps:
[( 682 - 820 ) ÷ 820] x 100 = -16.83%
Formula
Percentage change = [(682 - 820) / 820] x 100
Subtract the new number by the original number
682 - 820 = -138
-138 ÷ 820 = -0.16829268292682928
-0.16829268292682928 x 100 = -16.83%