-5.11% is the change from 665 to 631
Calculation steps:
[( 631 - 665 ) ÷ 665] x 100 = -5.11%
Formula
Percentage change = [(631 - 665) / 665] x 100
Subtract the new number by the original number
631 - 665 = -34
-34 ÷ 665 = -0.05112781954887218
-0.05112781954887218 x 100 = -5.11%