-49.03% is the change from 673 to 343
Calculation steps:
[( 343 - 673 ) ÷ 673] x 100 = -49.03%
Formula
Percentage change = [(343 - 673) / 673] x 100
Subtract the new number by the original number
343 - 673 = -330
-330 ÷ 673 = -0.4903417533432392
-0.4903417533432392 x 100 = -49.03%