-20.88% is the change from 680 to 538
Calculation steps:
[( 538 - 680 ) ÷ 680] x 100 = -20.88%
Formula
Percentage change = [(538 - 680) / 680] x 100
Subtract the new number by the original number
538 - 680 = -142
-142 ÷ 680 = -0.2088235294117647
-0.2088235294117647 x 100 = -20.88%