-97.23% is the change from 686 to 19
Calculation steps:
[( 19 - 686 ) ÷ 686] x 100 = -97.23%
Formula
Percentage change = [(19 - 686) / 686] x 100
Subtract the new number by the original number
19 - 686 = -667
-667 ÷ 686 = -0.9723032069970845
-0.9723032069970845 x 100 = -97.23%