-87.33% is the change from 821 to 104
Calculation steps:
[( 104 - 821 ) ÷ 821] x 100 = -87.33%
Formula
Percentage change = [(104 - 821) / 821] x 100
Subtract the new number by the original number
104 - 821 = -717
-717 ÷ 821 = -0.8733252131546894
-0.8733252131546894 x 100 = -87.33%