-99.39% is the change from 819 to 5
Calculation steps:
[( 5 - 819 ) ÷ 819] x 100 = -99.39%
Formula
Percentage change = [(5 - 819) / 819] x 100
Subtract the new number by the original number
5 - 819 = -814
-814 ÷ 819 = -0.9938949938949939
-0.9938949938949939 x 100 = -99.39%