#### Answer

Option $D$

#### Work Step by Step

Let x = original price
Note that $60\%=0.60$.
A $60\%$ discount means 60 percent of the original price is deducted from the original price itself.
Thus, in mathematical sentence, a 60-percent discount is represented by:
$x-60\%x = x - 0.60x = 0.40x$
Since $0.4 = \dfrac{4}{10}$. then the discounted price is also equivalent to $\dfrac{4}{10}x$.
Therefore, the one in Option D does not represent the discounted/sale price.