-13.17% is the change from 767 to 666
Calculation steps:
[( 666 - 767 ) ÷ 767] x 100 = -13.17%
Formula
Percentage change = [(666 - 767) / 767] x 100
Subtract the new number by the original number
666 - 767 = -101
-101 ÷ 767 = -0.1316818774445893
-0.1316818774445893 x 100 = -13.17%