-7.21% is the change from 680 to 631
Calculation steps:
[( 631 - 680 ) ÷ 680] x 100 = -7.21%
Formula
Percentage change = [(631 - 680) / 680] x 100
Subtract the new number by the original number
631 - 680 = -49
-49 ÷ 680 = -0.07205882352941176
-0.07205882352941176 x 100 = -7.21%