-5.96% is the change from 671 to 631
Calculation steps:
[( 631 - 671 ) ÷ 671] x 100 = -5.96%
Formula
Percentage change = [(631 - 671) / 671] x 100
Subtract the new number by the original number
631 - 671 = -40
-40 ÷ 671 = -0.05961251862891207
-0.05961251862891207 x 100 = -5.96%