-48.8% is the change from 627 to 321
Calculation steps:
[( 321 - 627 ) ÷ 627] x 100 = -48.8%
Formula
Percentage change = [(321 - 627) / 627] x 100
Subtract the new number by the original number
321 - 627 = -306
-306 ÷ 627 = -0.4880382775119617
-0.4880382775119617 x 100 = -48.8%