-99.84% is the change from 631 to 1
Calculation steps:
[( 1 - 631 ) ÷ 631] x 100 = -99.84%
Formula
Percentage change = [(1 - 631) / 631] x 100
Subtract the new number by the original number
1 - 631 = -630
-630 ÷ 631 = -0.9984152139461173
-0.9984152139461173 x 100 = -99.84%