-28.59% is the change from 668 to 477
Calculation steps:
[( 477 - 668 ) ÷ 668] x 100 = -28.59%
Formula
Percentage change = [(477 - 668) / 668] x 100
Subtract the new number by the original number
477 - 668 = -191
-191 ÷ 668 = -0.28592814371257486
-0.28592814371257486 x 100 = -28.59%