-98.93% is the change from 838 to 9
Calculation steps:
[( 9 - 838 ) ÷ 838] x 100 = -98.93%
Formula
Percentage change = [(9 - 838) / 838] x 100
Subtract the new number by the original number
9 - 838 = -829
-829 ÷ 838 = -0.9892601431980907
-0.9892601431980907 x 100 = -98.93%