-94.12% is the change from 663 to 39
Calculation steps:
[( 39 - 663 ) ÷ 663] x 100 = -94.12%
Formula
Percentage change = [(39 - 663) / 663] x 100
Subtract the new number by the original number
39 - 663 = -624
-624 ÷ 663 = -0.9411764705882353
-0.9411764705882353 x 100 = -94.12%