-1.6% is the change from 686 to 675
Calculation steps:
[( 675 - 686 ) ÷ 686] x 100 = -1.6%
Formula
Percentage change = [(675 - 686) / 686] x 100
Subtract the new number by the original number
675 - 686 = -11
-11 ÷ 686 = -0.016034985422740525
-0.016034985422740525 x 100 = -1.6%