-99.84% is the change from 619 to 1
Calculation steps:
[( 1 - 619 ) ÷ 619] x 100 = -99.84%
Formula
Percentage change = [(1 - 619) / 619] x 100
Subtract the new number by the original number
1 - 619 = -618
-618 ÷ 619 = -0.9983844911147012
-0.9983844911147012 x 100 = -99.84%