-11.69% is the change from 770 to 680
Calculation steps:
[( 680 - 770 ) ÷ 770] x 100 = -11.69%
Formula
Percentage change = [(680 - 770) / 770] x 100
Subtract the new number by the original number
680 - 770 = -90
-90 ÷ 770 = -0.11688311688311688
-0.11688311688311688 x 100 = -11.69%