-99.84% is the change from 610 to 1
Calculation steps:
[( 1 - 610 ) ÷ 610] x 100 = -99.84%
Formula
Percentage change = [(1 - 610) / 610] x 100
Subtract the new number by the original number
1 - 610 = -609
-609 ÷ 610 = -0.9983606557377049
-0.9983606557377049 x 100 = -99.84%