-98.67% is the change from 679 to 9
Calculation steps:
[( 9 - 679 ) ÷ 679] x 100 = -98.67%
Formula
Percentage change = [(9 - 679) / 679] x 100
Subtract the new number by the original number
9 - 679 = -670
-670 ÷ 679 = -0.9867452135493373
-0.9867452135493373 x 100 = -98.67%