一种家电,先提价10%,又降价10%,最后售价与提价前比(  ) A.升了10% B.降了10% C.降了1% D

2025-01-02 14:30:44
推荐回答(1个)
回答1:

设原价是1,则提价后的价格是:
1×(1+10%),
=1×110%,
=1.1;
现价是:1.1×(1-10%)
=1.1×90%,
=0.99;
(1-0.99)÷1,
=0.01÷1,
=1%;
答:售价与提价前比降了1%.
故答案选:C.