-3.53% is the change from 680 to 656
Calculation steps:
[( 656 - 680 ) ÷ 680] x 100 = -3.53%
Formula
Percentage change = [(656 - 680) / 680] x 100
Subtract the new number by the original number
656 - 680 = -24
-24 ÷ 680 = -0.03529411764705882
-0.03529411764705882 x 100 = -3.53%