8. The mall advertisement reads "50% off sale on every item", and at checkout, if a coupon is used, the price is reduced by another 20%. Then, after using the coupon, the payment price is ( ) of the original.
(A) $10 \%$
(B) $33 \%$
(C) $40 \%$
(D) $60 \%$
(E) $70 \%$
8. C.

Let the original price be $x$, the current price be $x \times 50\% \times 80\%$.
$$
\text{Then } \frac{x \times 50\% \times 80\%}{x} \times 100\% = 40\% \text{.}
$$