-41.5% is the change from 665 to 389
Calculation steps:
[( 389 - 665 ) ÷ 665] x 100 = -41.5%
Formula
Percentage change = [(389 - 665) / 665] x 100
Subtract the new number by the original number
389 - 665 = -276
-276 ÷ 665 = -0.4150375939849624
-0.4150375939849624 x 100 = -41.5%