-89.44% is the change from 805 to 85
Calculation steps:
[( 85 - 805 ) ÷ 805] x 100 = -89.44%
Formula
Percentage change = [(85 - 805) / 805] x 100
Subtract the new number by the original number
85 - 805 = -720
-720 ÷ 805 = -0.8944099378881988
-0.8944099378881988 x 100 = -89.44%