-48.42% is the change from 663 to 342
Calculation steps:
[( 342 - 663 ) ÷ 663] x 100 = -48.42%
Formula
Percentage change = [(342 - 663) / 663] x 100
Subtract the new number by the original number
342 - 663 = -321
-321 ÷ 663 = -0.4841628959276018
-0.4841628959276018 x 100 = -48.42%