-99.01% is the change from 807 to 8
Calculation steps:
[( 8 - 807 ) ÷ 807] x 100 = -99.01%
Formula
Percentage change = [(8 - 807) / 807] x 100
Subtract the new number by the original number
8 - 807 = -799
-799 ÷ 807 = -0.990086741016109
-0.990086741016109 x 100 = -99.01%