-99.83% is the change from 600 to 1
Calculation steps:
[( 1 - 600 ) ÷ 600] x 100 = -99.83%
Formula
Percentage change = [(1 - 600) / 600] x 100
Subtract the new number by the original number
1 - 600 = -599
-599 ÷ 600 = -0.9983333333333333
-0.9983333333333333 x 100 = -99.83%