-50.39% is the change from 649 to 322
Calculation steps:
[( 322 - 649 ) ÷ 649] x 100 = -50.39%
Formula
Percentage change = [(322 - 649) / 649] x 100
Subtract the new number by the original number
322 - 649 = -327
-327 ÷ 649 = -0.5038520801232665
-0.5038520801232665 x 100 = -50.39%