-99.12% is the change from 685 to 6
Calculation steps:
[( 6 - 685 ) ÷ 685] x 100 = -99.12%
Formula
Percentage change = [(6 - 685) / 685] x 100
Subtract the new number by the original number
6 - 685 = -679
-679 ÷ 685 = -0.9912408759124087
-0.9912408759124087 x 100 = -99.12%