-38.5% is the change from 665 to 409
Calculation steps:
[( 409 - 665 ) ÷ 665] x 100 = -38.5%
Formula
Percentage change = [(409 - 665) / 665] x 100
Subtract the new number by the original number
409 - 665 = -256
-256 ÷ 665 = -0.3849624060150376
-0.3849624060150376 x 100 = -38.5%