-18.57% is the change from 684 to 557
Calculation steps:
[( 557 - 684 ) ÷ 684] x 100 = -18.57%
Formula
Percentage change = [(557 - 684) / 684] x 100
Subtract the new number by the original number
557 - 684 = -127
-127 ÷ 684 = -0.18567251461988304
-0.18567251461988304 x 100 = -18.57%