-86.57% is the change from 618 to 83
Calculation steps:
[( 83 - 618 ) ÷ 618] x 100 = -86.57%
Formula
Percentage change = [(83 - 618) / 618] x 100
Subtract the new number by the original number
83 - 618 = -535
-535 ÷ 618 = -0.8656957928802589
-0.8656957928802589 x 100 = -86.57%