-99.51% is the change from 812 to 4
Calculation steps:
[( 4 - 812 ) ÷ 812] x 100 = -99.51%
Formula
Percentage change = [(4 - 812) / 812] x 100
Subtract the new number by the original number
4 - 812 = -808
-808 ÷ 812 = -0.9950738916256158
-0.9950738916256158 x 100 = -99.51%