-48.3% is the change from 646 to 334
Calculation steps:
[( 334 - 646 ) ÷ 646] x 100 = -48.3%
Formula
Percentage change = [(334 - 646) / 646] x 100
Subtract the new number by the original number
334 - 646 = -312
-312 ÷ 646 = -0.48297213622291024
-0.48297213622291024 x 100 = -48.3%