-99.39% is the change from 823 to 5
Calculation steps:
[( 5 - 823 ) ÷ 823] x 100 = -99.39%
Formula
Percentage change = [(5 - 823) / 823] x 100
Subtract the new number by the original number
5 - 823 = -818
-818 ÷ 823 = -0.9939246658566221
-0.9939246658566221 x 100 = -99.39%