-8.68% is the change from 680 to 621
Calculation steps:
[( 621 - 680 ) ÷ 680] x 100 = -8.68%
Formula
Percentage change = [(621 - 680) / 680] x 100
Subtract the new number by the original number
621 - 680 = -59
-59 ÷ 680 = -0.08676470588235294
-0.08676470588235294 x 100 = -8.68%