-7.9% is the change from 671 to 618
Calculation steps:
[( 618 - 671 ) ÷ 671] x 100 = -7.9%
Formula
Percentage change = [(618 - 671) / 671] x 100
Subtract the new number by the original number
618 - 671 = -53
-53 ÷ 671 = -0.07898658718330849
-0.07898658718330849 x 100 = -7.9%