-97.78% is the change from 812 to 18
Calculation steps:
[( 18 - 812 ) ÷ 812] x 100 = -97.78%
Formula
Percentage change = [(18 - 812) / 812] x 100
Subtract the new number by the original number
18 - 812 = -794
-794 ÷ 812 = -0.9778325123152709
-0.9778325123152709 x 100 = -97.78%