-89.68% is the change from 843 to 87
Calculation steps:
[( 87 - 843 ) ÷ 843] x 100 = -89.68%
Formula
Percentage change = [(87 - 843) / 843] x 100
Subtract the new number by the original number
87 - 843 = -756
-756 ÷ 843 = -0.896797153024911
-0.896797153024911 x 100 = -89.68%