-99.52% is the change from 620 to 3
Calculation steps:
[( 3 - 620 ) ÷ 620] x 100 = -99.52%
Formula
Percentage change = [(3 - 620) / 620] x 100
Subtract the new number by the original number
3 - 620 = -617
-617 ÷ 620 = -0.9951612903225806
-0.9951612903225806 x 100 = -99.52%