-27.4% is the change from 668 to 485
Calculation steps:
[( 485 - 668 ) ÷ 668] x 100 = -27.4%
Formula
Percentage change = [(485 - 668) / 668] x 100
Subtract the new number by the original number
485 - 668 = -183
-183 ÷ 668 = -0.27395209580838326
-0.27395209580838326 x 100 = -27.4%