The original marked price of a watch is$2800.If the shop owner raises the marked price by25% and then sells it at 30% off,
(a)find the selling price of the watch
(b)find overall persentage discount
F.1 Maths
2009-01-02 8:13 am
回答 (2)
2009-01-02 8:39 am
✔ 最佳答案
a) 其實順著問題一步步做已可解決問題. 問題問售價, 所以主體是價錢, 單位是 $Marked price $2800
Raised new price $2800 x (1+25%) = $3500
Discount 30% off $3500 x (1-30%) = $2450
Selling price is $2450
b) 由於最後售價較平, 單位是 %
$2450 / $2800 = 0.875
變成 percent = 0.875 x 100% = 87.5%
Overall percentage discount = 87.5%
2009-01-02 8:21 am
a) 2800*125/100*70/100=2450
b) 100%-(2450/2800*100%)=12.5% off
b) 100%-(2450/2800*100%)=12.5% off
收錄日期: 2021-04-13 16:20:43
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