-98.92% is the change from 836 to 9
Calculation steps:
[( 9 - 836 ) ÷ 836] x 100 = -98.92%
Formula
Percentage change = [(9 - 836) / 836] x 100
Subtract the new number by the original number
9 - 836 = -827
-827 ÷ 836 = -0.9892344497607656
-0.9892344497607656 x 100 = -98.92%