-27.93% is the change from 666 to 480
Calculation steps:
[( 480 - 666 ) ÷ 666] x 100 = -27.93%
Formula
Percentage change = [(480 - 666) / 666] x 100
Subtract the new number by the original number
480 - 666 = -186
-186 ÷ 666 = -0.27927927927927926
-0.27927927927927926 x 100 = -27.93%