-16.65% is the change from 799 to 666
Calculation steps:
[( 666 - 799 ) ÷ 799] x 100 = -16.65%
Formula
Percentage change = [(666 - 799) / 799] x 100
Subtract the new number by the original number
666 - 799 = -133
-133 ÷ 799 = -0.16645807259073842
-0.16645807259073842 x 100 = -16.65%