-16.93% is the change from 821 to 682
Calculation steps:
[( 682 - 821 ) ÷ 821] x 100 = -16.93%
Formula
Percentage change = [(682 - 821) / 821] x 100
Subtract the new number by the original number
682 - 821 = -139
-139 ÷ 821 = -0.16930572472594396
-0.16930572472594396 x 100 = -16.93%