一种商品,先降价30%后,又提价30%,现价是原价的(  ) A.91% B.100% C.109

日期:2021-05-02 09:59:48 人气:1

一种商品,先降价30%后,又提价30%,现价是原价的(  ) A.91% B.100% C.109

设原价是1,则:
1×(1-30%)=0.7;
0.7×(1+30%)
=0.7×130%,
=0.91;
0.91÷1=91%;
答:现价是原价的91%.
故选:A.

    A+
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