-99.13% is the change from 686 to 6
Calculation steps:
[( 6 - 686 ) ÷ 686] x 100 = -99.13%
Formula
Percentage change = [(6 - 686) / 686] x 100
Subtract the new number by the original number
6 - 686 = -680
-680 ÷ 686 = -0.9912536443148688
-0.9912536443148688 x 100 = -99.13%
Example