-85.42% is the change from 686 to 100
Calculation steps:
[( 100 - 686 ) ÷ 686] x 100 = -85.42%
Formula
Percentage change = [(100 - 686) / 686] x 100
Subtract the new number by the original number
100 - 686 = -586
-586 ÷ 686 = -0.8542274052478134
-0.8542274052478134 x 100 = -85.42%