-9.65% is the change from 684 to 618
Calculation steps:
[( 618 - 684 ) ÷ 684] x 100 = -9.65%
Formula
Percentage change = [(618 - 684) / 684] x 100
Subtract the new number by the original number
618 - 684 = -66
-66 ÷ 684 = -0.09649122807017543
-0.09649122807017543 x 100 = -9.65%