-99.75% is the change from 816 to 2
Calculation steps:
[( 2 - 816 ) ÷ 816] x 100 = -99.75%
Formula
Percentage change = [(2 - 816) / 816] x 100
Subtract the new number by the original number
2 - 816 = -814
-814 ÷ 816 = -0.9975490196078431
-0.9975490196078431 x 100 = -99.75%