-99.14% is the change from 816 to 7
Calculation steps:
[( 7 - 816 ) ÷ 816] x 100 = -99.14%
Formula
Percentage change = [(7 - 816) / 816] x 100
Subtract the new number by the original number
7 - 816 = -809
-809 ÷ 816 = -0.991421568627451
-0.991421568627451 x 100 = -99.14%