-46.81% is the change from 643 to 342
Calculation steps:
[( 342 - 643 ) ÷ 643] x 100 = -46.81%
Formula
Percentage change = [(342 - 643) / 643] x 100
Subtract the new number by the original number
342 - 643 = -301
-301 ÷ 643 = -0.4681181959564541
-0.4681181959564541 x 100 = -46.81%