-99.84% is the change from 627 to 1
Calculation steps:
[( 1 - 627 ) ÷ 627] x 100 = -99.84%
Formula
Percentage change = [(1 - 627) / 627] x 100
Subtract the new number by the original number
1 - 627 = -626
-626 ÷ 627 = -0.9984051036682615
-0.9984051036682615 x 100 = -99.84%