-98.1% is the change from 686 to 13
Calculation steps:
[( 13 - 686 ) ÷ 686] x 100 = -98.1%
Formula
Percentage change = [(13 - 686) / 686] x 100
Subtract the new number by the original number
13 - 686 = -673
-673 ÷ 686 = -0.9810495626822158
-0.9810495626822158 x 100 = -98.1%