-89.37% is the change from 809 to 86
Calculation steps:
[( 86 - 809 ) ÷ 809] x 100 = -89.37%
Formula
Percentage change = [(86 - 809) / 809] x 100
Subtract the new number by the original number
86 - 809 = -723
-723 ÷ 809 = -0.8936959208899876
-0.8936959208899876 x 100 = -89.37%