-4.51% is the change from 665 to 635
Calculation steps:
[( 635 - 665 ) ÷ 665] x 100 = -4.51%
Formula
Percentage change = [(635 - 665) / 665] x 100
Subtract the new number by the original number
635 - 665 = -30
-30 ÷ 665 = -0.045112781954887216
-0.045112781954887216 x 100 = -4.51%