-4.09% is the change from 684 to 656
Calculation steps:
[( 656 - 684 ) ÷ 684] x 100 = -4.09%
Formula
Percentage change = [(656 - 684) / 684] x 100
Subtract the new number by the original number
656 - 684 = -28
-28 ÷ 684 = -0.04093567251461988
-0.04093567251461988 x 100 = -4.09%