-98.69% is the change from 685 to 9
Calculation steps:
[( 9 - 685 ) ÷ 685] x 100 = -98.69%
Formula
Percentage change = [(9 - 685) / 685] x 100
Subtract the new number by the original number
9 - 685 = -676
-676 ÷ 685 = -0.9868613138686131
-0.9868613138686131 x 100 = -98.69%