-98.55% is the change from 619 to 9
Calculation steps:
[( 9 - 619 ) ÷ 619] x 100 = -98.55%
Formula
Percentage change = [(9 - 619) / 619] x 100
Subtract the new number by the original number
9 - 619 = -610
-610 ÷ 619 = -0.9854604200323102
-0.9854604200323102 x 100 = -98.55%