-98.45% is the change from 579 to 9
Calculation steps:
[( 9 - 579 ) ÷ 579] x 100 = -98.45%
Formula
Percentage change = [(9 - 579) / 579] x 100
Subtract the new number by the original number
9 - 579 = -570
-570 ÷ 579 = -0.9844559585492227
-0.9844559585492227 x 100 = -98.45%