-82.51% is the change from 686 to 120
Calculation steps:
[( 120 - 686 ) ÷ 686] x 100 = -82.51%
Formula
Percentage change = [(120 - 686) / 686] x 100
Subtract the new number by the original number
120 - 686 = -566
-566 ÷ 686 = -0.8250728862973761
-0.8250728862973761 x 100 = -82.51%