-13.23% is the change from 665 to 577
Calculation steps:
[( 577 - 665 ) ÷ 665] x 100 = -13.23%
Formula
Percentage change = [(577 - 665) / 665] x 100
Subtract the new number by the original number
577 - 665 = -88
-88 ÷ 665 = -0.13233082706766916
-0.13233082706766916 x 100 = -13.23%