-84.3% is the change from 618 to 97
Calculation steps:
[( 97 - 618 ) ÷ 618] x 100 = -84.3%
Formula
Percentage change = [(97 - 618) / 618] x 100
Subtract the new number by the original number
97 - 618 = -521
-521 ÷ 618 = -0.843042071197411
-0.843042071197411 x 100 = -84.3%