-99.35% is the change from 620 to 4
Calculation steps:
[( 4 - 620 ) ÷ 620] x 100 = -99.35%
Formula
Percentage change = [(4 - 620) / 620] x 100
Subtract the new number by the original number
4 - 620 = -616
-616 ÷ 620 = -0.9935483870967742
-0.9935483870967742 x 100 = -99.35%