-98.69% is the change from 686 to 9
Calculation steps:
[( 9 - 686 ) ÷ 686] x 100 = -98.69%
Formula
Percentage change = [(9 - 686) / 686] x 100
Subtract the new number by the original number
9 - 686 = -677
-677 ÷ 686 = -0.9868804664723032
-0.9868804664723032 x 100 = -98.69%