-93.71% is the change from 620 to 39
Calculation steps:
[( 39 - 620 ) ÷ 620] x 100 = -93.71%
Formula
Percentage change = [(39 - 620) / 620] x 100
Subtract the new number by the original number
39 - 620 = -581
-581 ÷ 620 = -0.9370967741935484
-0.9370967741935484 x 100 = -93.71%