-46.9% is the change from 646 to 343
Calculation steps:
[( 343 - 646 ) ÷ 646] x 100 = -46.9%
Formula
Percentage change = [(343 - 646) / 646] x 100
Subtract the new number by the original number
343 - 646 = -303
-303 ÷ 646 = -0.46904024767801855
-0.46904024767801855 x 100 = -46.9%