-99.88% is the change from 828 to 1
Calculation steps:
[( 1 - 828 ) ÷ 828] x 100 = -99.88%
Formula
Percentage change = [(1 - 828) / 828] x 100
Subtract the new number by the original number
1 - 828 = -827
-827 ÷ 828 = -0.998792270531401
-0.998792270531401 x 100 = -99.88%