-28.68% is the change from 666 to 475
Calculation steps:
[( 475 - 666 ) ÷ 666] x 100 = -28.68%
Formula
Percentage change = [(475 - 666) / 666] x 100
Subtract the new number by the original number
475 - 666 = -191
-191 ÷ 666 = -0.28678678678678676
-0.28678678678678676 x 100 = -28.68%