-99.83% is the change from 605 to 1
Calculation steps:
[( 1 - 605 ) ÷ 605] x 100 = -99.83%
Formula
Percentage change = [(1 - 605) / 605] x 100
Subtract the new number by the original number
1 - 605 = -604
-604 ÷ 605 = -0.9983471074380166
-0.9983471074380166 x 100 = -99.83%