-99.19% is the change from 620 to 5
Calculation steps:
[( 5 - 620 ) ÷ 620] x 100 = -99.19%
Formula
Percentage change = [(5 - 620) / 620] x 100
Subtract the new number by the original number
5 - 620 = -615
-615 ÷ 620 = -0.9919354838709677
-0.9919354838709677 x 100 = -99.19%