-97.09% is the change from 618 to 18
Calculation steps:
[( 18 - 618 ) ÷ 618] x 100 = -97.09%
Formula
Percentage change = [(18 - 618) / 618] x 100
Subtract the new number by the original number
18 - 618 = -600
-600 ÷ 618 = -0.970873786407767
-0.970873786407767 x 100 = -97.09%