-51.39% is the change from 646 to 314
Calculation steps:
[( 314 - 646 ) ÷ 646] x 100 = -51.39%
Formula
Percentage change = [(314 - 646) / 646] x 100
Subtract the new number by the original number
314 - 646 = -332
-332 ÷ 646 = -0.5139318885448917
-0.5139318885448917 x 100 = -51.39%