Question

促销时，店主把一条 $\$10$ 围巾降价 $20\%$ 。后来价格再次降低，这次降低为折后价的一半。现在价格是

For a sale, a store owner reduces the price of a $\$10$ scarf by $20\% .$ Later the price is lowered again, this time by one-half the reduced price. The price is now

$\$2.00$

$\$3.75$

$\$4.00$

$\$4.90$

$\$6.40$

答案：C

知识点：百分数

难度评级：860

解答：

第一次降价 $20\%$ 后，价格为 $\$10\cdot 0.8=\$8$ 。

再减半后，价格为 $\dfrac {\$8}2 = \$4$ 。

所以正确答案是 C。

After the $20\%$ reduction, the price is $\$10\cdot 0.8=\$8.$

Then, after halving the price, the price is $\dfrac {\$8}2 = \$4.$

Thus, the correct answer is C .

1998 AMC 8 第 9 题

答案：C

难度评级：860

解答：

其他年份的第 9 题