-99.84% is the change from 628 to 1
Calculation steps:
[( 1 - 628 ) ÷ 628] x 100 = -99.84%
Formula
Percentage change = [(1 - 628) / 628] x 100
Subtract the new number by the original number
1 - 628 = -627
-627 ÷ 628 = -0.9984076433121019
-0.9984076433121019 x 100 = -99.84%