-90.03% is the change from 873 to 87
Calculation steps:
[( 87 - 873 ) ÷ 873] x 100 = -90.03%
Formula
Percentage change = [(87 - 873) / 873] x 100
Subtract the new number by the original number
87 - 873 = -786
-786 ÷ 873 = -0.9003436426116839
-0.9003436426116839 x 100 = -90.03%