-49.32% is the change from 663 to 336
Calculation steps:
[( 336 - 663 ) ÷ 663] x 100 = -49.32%
Formula
Percentage change = [(336 - 663) / 663] x 100
Subtract the new number by the original number
336 - 663 = -327
-327 ÷ 663 = -0.49321266968325794
-0.49321266968325794 x 100 = -49.32%