-40.45% is the change from 665 to 396
Calculation steps:
[( 396 - 665 ) ÷ 665] x 100 = -40.45%
Formula
Percentage change = [(396 - 665) / 665] x 100
Subtract the new number by the original number
396 - 665 = -269
-269 ÷ 665 = -0.4045112781954887
-0.4045112781954887 x 100 = -40.45%