-15.27% is the change from 786 to 666
Calculation steps:
[( 666 - 786 ) ÷ 786] x 100 = -15.27%
Formula
Percentage change = [(666 - 786) / 786] x 100
Subtract the new number by the original number
666 - 786 = -120
-120 ÷ 786 = -0.15267175572519084
-0.15267175572519084 x 100 = -15.27%