-1.31% is the change from 686 to 677
Calculation steps:
[( 677 - 686 ) ÷ 686] x 100 = -1.31%
Formula
Percentage change = [(677 - 686) / 686] x 100
Subtract the new number by the original number
677 - 686 = -9
-9 ÷ 686 = -0.013119533527696793
-0.013119533527696793 x 100 = -1.31%