-99.88% is the change from 816 to 1
Calculation steps:
[( 1 - 816 ) ÷ 816] x 100 = -99.88%
Formula
Percentage change = [(1 - 816) / 816] x 100
Subtract the new number by the original number
1 - 816 = -815
-815 ÷ 816 = -0.9987745098039216
-0.9987745098039216 x 100 = -99.88%