-11.76% is the change from 680 to 600
Calculation steps:
[( 600 - 680 ) ÷ 680] x 100 = -11.76%
Formula
Percentage change = [(600 - 680) / 680] x 100
Subtract the new number by the original number
600 - 680 = -80
-80 ÷ 680 = -0.11764705882352941
-0.11764705882352941 x 100 = -11.76%