-19.58% is the change from 618 to 497
Calculation steps:
[( 497 - 618 ) ÷ 618] x 100 = -19.58%
Formula
Percentage change = [(497 - 618) / 618] x 100
Subtract the new number by the original number
497 - 618 = -121
-121 ÷ 618 = -0.19579288025889968
-0.19579288025889968 x 100 = -19.58%