-46.24% is the change from 638 to 343
Calculation steps:
[( 343 - 638 ) ÷ 638] x 100 = -46.24%
Formula
Percentage change = [(343 - 638) / 638] x 100
Subtract the new number by the original number
343 - 638 = -295
-295 ÷ 638 = -0.46238244514106586
-0.46238244514106586 x 100 = -46.24%