-18.09% is the change from 680 to 557
Calculation steps:
[( 557 - 680 ) ÷ 680] x 100 = -18.09%
Formula
Percentage change = [(557 - 680) / 680] x 100
Subtract the new number by the original number
557 - 680 = -123
-123 ÷ 680 = -0.18088235294117647
-0.18088235294117647 x 100 = -18.09%