-93.84% is the change from 649 to 40
Calculation steps:
[( 40 - 649 ) ÷ 649] x 100 = -93.84%
Formula
Percentage change = [(40 - 649) / 649] x 100
Subtract the new number by the original number
40 - 649 = -609
-609 ÷ 649 = -0.938366718027735
-0.938366718027735 x 100 = -93.84%