-53.68% is the change from 665 to 308
Calculation steps:
[( 308 - 665 ) ÷ 665] x 100 = -53.68%
Formula
Percentage change = [(308 - 665) / 665] x 100
Subtract the new number by the original number
308 - 665 = -357
-357 ÷ 665 = -0.5368421052631579
-0.5368421052631579 x 100 = -53.68%