-13.36% is the change from 771 to 668
Calculation steps:
[( 668 - 771 ) ÷ 771] x 100 = -13.36%
Formula
Percentage change = [(668 - 771) / 771] x 100
Subtract the new number by the original number
668 - 771 = -103
-103 ÷ 771 = -0.13359273670557717
-0.13359273670557717 x 100 = -13.36%