-89.54% is the change from 813 to 85
Calculation steps:
[( 85 - 813 ) ÷ 813] x 100 = -89.54%
Formula
Percentage change = [(85 - 813) / 813] x 100
Subtract the new number by the original number
85 - 813 = -728
-728 ÷ 813 = -0.8954489544895449
-0.8954489544895449 x 100 = -89.54%