-13.25% is the change from 770 to 668
Calculation steps:
[( 668 - 770 ) ÷ 770] x 100 = -13.25%
Formula
Percentage change = [(668 - 770) / 770] x 100
Subtract the new number by the original number
668 - 770 = -102
-102 ÷ 770 = -0.13246753246753246
-0.13246753246753246 x 100 = -13.25%