-8.12% is the change from 665 to 611
Calculation steps:
[( 611 - 665 ) ÷ 665] x 100 = -8.12%
Formula
Percentage change = [(611 - 665) / 665] x 100
Subtract the new number by the original number
611 - 665 = -54
-54 ÷ 665 = -0.081203007518797
-0.081203007518797 x 100 = -8.12%