-40.27% is the change from 663 to 396
Calculation steps:
[( 396 - 663 ) ÷ 663] x 100 = -40.27%
Formula
Percentage change = [(396 - 663) / 663] x 100
Subtract the new number by the original number
396 - 663 = -267
-267 ÷ 663 = -0.40271493212669685
-0.40271493212669685 x 100 = -40.27%