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標題:

有數學唔識做??

發問:

1.王先生去年買了一套價值$150郵票,今年這套郵票的價值升至$210。若他把這套郵票賣出,求盈虧百分率。 2.馬先生以$1200購入100本記事本.並以每本$20售出,求盈虧百分率。 3.五先生以$9500買入10套西裝,其後以每套$1140賣出全部西裝。問他所獲盈虧百分率是多少。 要有過程

最佳解答:

1.盈虧百分率 (210-150)/210 * 100% =60/210 * 100% =28 4/7% 2. 盈虧百分率 (20 * 100 - 1200) / 1200 * 60% =800 / 1200 * 60% =66 2/3% 3. 盈虧百分率 (1140 * 10 - 9500) / 9500 * 100% =(11400-9500) / 9500 *100% =1900 / 9500 * 100% =20% 2007-04-19 23:09:13 補充: 1.盈虧百分率(210-150)/150 * 100%=60/150 * 100%=40%

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其他解答:

你好! 1) 210-150/150X100% =60/150x100% =40% 2)20X100-1200/1200X100% =800/1200X100% =66又2/3% 3)1140x10-9500/9500x100% =1900/9500X100% =20% 希望我可以幫到你啦!|||||method : (new - old ) / old *100% 1. (210 -150) / 150*100%=40% 2. (100*20 - 1200 ) / 1200 *100% = 66.7% ( corr.to 3 sig. fig ) 3. (10 *1140 - 9500 ) / 9500 *100% = 20% I am sorry that I don't know how to write the formular in complete sentences you' d better check the answer book.|||||1) 210-150/150X100% =60/150x100% =40% 2)20X100-1200/1200X100% =800/1200X100% =66又2/3% 3)1140x10-9500/9500x100% =1900/9500X100% =20%FAD2A23AB937987B

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