-89.85% is the change from 818 to 83
Calculation steps:
[( 83 - 818 ) ÷ 818] x 100 = -89.85%
Formula
Percentage change = [(83 - 818) / 818] x 100
Subtract the new number by the original number
83 - 818 = -735
-735 ÷ 818 = -0.8985330073349633
-0.8985330073349633 x 100 = -89.85%