-81.92% is the change from 686 to 124
Calculation steps:
[( 124 - 686 ) ÷ 686] x 100 = -81.92%
Formula
Percentage change = [(124 - 686) / 686] x 100
Subtract the new number by the original number
124 - 686 = -562
-562 ÷ 686 = -0.8192419825072886
-0.8192419825072886 x 100 = -81.92%