-47.07% is the change from 648 to 343
Calculation steps:
[( 343 - 648 ) ÷ 648] x 100 = -47.07%
Formula
Percentage change = [(343 - 648) / 648] x 100
Subtract the new number by the original number
343 - 648 = -305
-305 ÷ 648 = -0.470679012345679
-0.470679012345679 x 100 = -47.07%