-50.08% is the change from 649 to 324
Calculation steps:
[( 324 - 649 ) ÷ 649] x 100 = -50.08%
Formula
Percentage change = [(324 - 649) / 649] x 100
Subtract the new number by the original number
324 - 649 = -325
-325 ÷ 649 = -0.5007704160246533
-0.5007704160246533 x 100 = -50.08%