-99.4% is the change from 828 to 5
Calculation steps:
[( 5 - 828 ) ÷ 828] x 100 = -99.4%
Formula
Percentage change = [(5 - 828) / 828] x 100
Subtract the new number by the original number
5 - 828 = -823
-823 ÷ 828 = -0.9939613526570048
-0.9939613526570048 x 100 = -99.4%