-98.54% is the change from 618 to 9
Calculation steps:
[( 9 - 618 ) ÷ 618] x 100 = -98.54%
Formula
Percentage change = [(9 - 618) / 618] x 100
Subtract the new number by the original number
9 - 618 = -609
-609 ÷ 618 = -0.9854368932038835
-0.9854368932038835 x 100 = -98.54%