-46.73% is the change from 642 to 342
Calculation steps:
[( 342 - 642 ) ÷ 642] x 100 = -46.73%
Formula
Percentage change = [(342 - 642) / 642] x 100
Subtract the new number by the original number
342 - 642 = -300
-300 ÷ 642 = -0.4672897196261682
-0.4672897196261682 x 100 = -46.73%