-83.5% is the change from 618 to 102
Calculation steps:
[( 102 - 618 ) ÷ 618] x 100 = -83.5%
Formula
Percentage change = [(102 - 618) / 618] x 100
Subtract the new number by the original number
102 - 618 = -516
-516 ÷ 618 = -0.8349514563106796
-0.8349514563106796 x 100 = -83.5%