-98.83% is the change from 686 to 8
Calculation steps:
[( 8 - 686 ) ÷ 686] x 100 = -98.83%
Formula
Percentage change = [(8 - 686) / 686] x 100
Subtract the new number by the original number
8 - 686 = -678
-678 ÷ 686 = -0.9883381924198251
-0.9883381924198251 x 100 = -98.83%