-8.08% is the change from 631 to 580
Calculation steps:
[( 580 - 631 ) ÷ 631] x 100 = -8.08%
Formula
Percentage change = [(580 - 631) / 631] x 100
Subtract the new number by the original number
580 - 631 = -51
-51 ÷ 631 = -0.08082408874801902
-0.08082408874801902 x 100 = -8.08%