數學難題呀........

2007-12-21 3:23 am
教下我= =

小明以$600售出了一個電熱水壼,盈利百分率為20%.
a)求該電熱水壼的成本(我識計,答案是$500)
b)若把該電熱水壼的售價下調55%,求小明的虧蝕百分率.(好難計,教下我)
更新1:

kken1234563個答案岩,但係我想要個步驟 asw係46% 但係我唔識步驟

更新2:

ayako12345個步驟岩= =thank 500-270 唔係500-280= =

回答 (9)

2007-12-21 3:40 am
✔ 最佳答案
b)小明把該電熱水壼的售價定為:
$600x(1-55%)
=$280//

小明的虧蝕百分率是:
500-280
$------------x100%
500

220
=$------x100%
500

=44%//





應該係...

2007-12-20 19:49:34 補充:
b)小明把該電熱水壼的售價定為:$600x(1-55%)=$270// 3

2007-12-20 19:53:10 補充:
b)小明把該電熱水壼的售價定為:$600x(1-55%)=$270//

2007-12-20 19:53:52 補充:
小明的虧蝕百分率是:500-270$------------x100%500

2007-12-20 19:54:39 補充:
230=$------x100%500=46%//
參考: 我既才智 哈哈
2007-12-21 6:28 am
現在的售價=600x55%
=330
虧蝕了=500-330
=170
虧蝕百分率=170/500x100%
=34%
2007-12-21 3:54 am
a) 假設該電熱水壼的成本是 $x.
售價 = 成本 * (1 + 盈利率)
=> 600 = x * (1 + 20%)
=> 600 = 1.2x
=> x = 600/1.2 = 500

該電熱水壼的成本是 $500.

b)若把該電熱水壼的售價下調55%.
新售價 = 售價 * (1 - 55%) = 600 * 0.45 = 270

虧蝕百分率 = 虧蝕 / 成本 * 100%
= (成本 - 新售價) / 成本 * 100%
= (500 - 270) / 500 * 100%
= 46%
2007-12-21 3:49 am
b=46%
參考: no
2007-12-21 3:46 am
a600*(1+20%)=500
b600*(1-55%)=270
參考: I and my brother
2007-12-21 3:32 am
應該係,,,,咁,,,,

小明賣600蚊,個成本係500蚊

[咁姐係

600-[500*(1-55%)]
=600-(500*0.45)
=600-225
=375

姐係小明蝕左375蚊

2007-12-20 19:35:35 補充:
why係375蚊因為小明係賣個陣係賣貴左100蚊所以佢有100蚊係平大左,冇profit又冇蝕到個100蚊所以就小蝕左10蚊喇

2007-12-20 19:39:47 補充:
所以就小蝕左100蚊喇咁個percentage係,[(355-600)/600]*100%=40.8%
2007-12-21 3:31 am
(600-600x55%)/500x100%
=46%
參考: my head
2007-12-21 3:29 am
a是600/(1+20%)
  =600/120%
  =600*6/5
  =500
b是 500*55%
   =500*11/20
   =275
2007-12-21 3:26 am
500x20%=600


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