-99.02% is the change from 816 to 8
Calculation steps:
[( 8 - 816 ) ÷ 816] x 100 = -99.02%
Formula
Percentage change = [(8 - 816) / 816] x 100
Subtract the new number by the original number
8 - 816 = -808
-808 ÷ 816 = -0.9901960784313726
-0.9901960784313726 x 100 = -99.02%