-99.17% is the change from 843 to 7
Calculation steps:
[( 7 - 843 ) ÷ 843] x 100 = -99.17%
Formula
Percentage change = [(7 - 843) / 843] x 100
Subtract the new number by the original number
7 - 843 = -836
-836 ÷ 843 = -0.9916963226571768
-0.9916963226571768 x 100 = -99.17%