-0.87% is the change from 690 to 684
Calculation steps:
[( 684 - 690 ) ÷ 690] x 100 = -0.87%
Formula
Percentage change = [(684 - 690) / 690] x 100
Subtract the new number by the original number
684 - 690 = -6
-6 ÷ 690 = -0.008695652173913044
-0.008695652173913044 x 100 = -0.87%