-6.15% is the change from 618 to 580
Calculation steps:
[( 580 - 618 ) ÷ 618] x 100 = -6.15%
Formula
Percentage change = [(580 - 618) / 618] x 100
Subtract the new number by the original number
580 - 618 = -38
-38 ÷ 618 = -0.061488673139158574
-0.061488673139158574 x 100 = -6.15%