-28.44% is the change from 668 to 478
Calculation steps:
[( 478 - 668 ) ÷ 668] x 100 = -28.44%
Formula
Percentage change = [(478 - 668) / 668] x 100
Subtract the new number by the original number
478 - 668 = -190
-190 ÷ 668 = -0.2844311377245509
-0.2844311377245509 x 100 = -28.44%