-89.61% is the change from 818 to 85
Calculation steps:
[( 85 - 818 ) ÷ 818] x 100 = -89.61%
Formula
Percentage change = [(85 - 818) / 818] x 100
Subtract the new number by the original number
85 - 818 = -733
-733 ÷ 818 = -0.8960880195599022
-0.8960880195599022 x 100 = -89.61%