-39.45% is the change from 649 to 393
Calculation steps:
[( 393 - 649 ) ÷ 649] x 100 = -39.45%
Formula
Percentage change = [(393 - 649) / 649] x 100
Subtract the new number by the original number
393 - 649 = -256
-256 ÷ 649 = -0.39445300462249616
-0.39445300462249616 x 100 = -39.45%