-1.9% is the change from 686 to 673
Calculation steps:
[( 673 - 686 ) ÷ 686] x 100 = -1.9%
Formula
Percentage change = [(673 - 686) / 686] x 100
Subtract the new number by the original number
673 - 686 = -13
-13 ÷ 686 = -0.018950437317784258
-0.018950437317784258 x 100 = -1.9%