一种豆浆机的价格先提高了20%,然后再降低到80%,结果与原价相比(  ) A.减低了20% B.不变 C.

2024-12-29 07:51:40
推荐回答(1个)
回答1:

设原价是1;
1×(1+20%)×80%,
=1×120%×80%,
=0.96;
(1-0.96)÷1,
=0.04÷1,
=4%;
结果降低了4%.
故选:C.