-99.84% is the change from 611 to 1
Calculation steps:
[( 1 - 611 ) ÷ 611] x 100 = -99.84%
Formula
Percentage change = [(1 - 611) / 611] x 100
Subtract the new number by the original number
1 - 611 = -610
-610 ÷ 611 = -0.9983633387888707
-0.9983633387888707 x 100 = -99.84%