-99.42% is the change from 686 to 4
Calculation steps:
[( 4 - 686 ) ÷ 686] x 100 = -99.42%
Formula
Percentage change = [(4 - 686) / 686] x 100
Subtract the new number by the original number
4 - 686 = -682
-682 ÷ 686 = -0.9941690962099126
-0.9941690962099126 x 100 = -99.42%