-80.9% is the change from 686 to 131
Calculation steps:
[( 131 - 686 ) ÷ 686] x 100 = -80.9%
Formula
Percentage change = [(131 - 686) / 686] x 100
Subtract the new number by the original number
131 - 686 = -555
-555 ÷ 686 = -0.8090379008746356
-0.8090379008746356 x 100 = -80.9%