數學問題~聽日要知喇.......

2007-01-09 10:49 am

A lamp which normally sells for $180 was puchased by a consumer for $120. How much of a discount dad the consumer receive?

呢條點計？
係計%定得到幾多錢？
咩意思？

回答 (7)

2007-01-09 6:51 pm

✔ 最佳答案

計discout即係計個減價比起原價的百分比%

一般係以減價(即原價 - 售價)除以原本價錢再乘以 100%

現原價是 $180
減價是 $60 ($180-$120)
所以 discount
= $60 / $180 x 100%
=1/3 x 100%
=33.33%

以上朋友都計得對, 但題目就是這樣解釋

記住, 減價=原價 - 最後售價
計discount時, 分母一定是原價

參考: 我幫人補習數學

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邁陂塘

2007-01-09 9:28 pm

計%

180-120
----------- x100%
180

=33.333333333......%

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