Convert a repeating fraction

Is there a percedure to convert a repeating fraction number into a p/q? (p and q are primes). For example, 0.55555555....=p/q

Thanks

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• 回复： -长空无际- ♀ (120 bytes) () 09/09/2003 postreply 13:53:00

• 小学知识补课！ -GDP8%- ♀ (231 bytes) () 09/09/2003 postreply 17:36:00

• 现在坛上只有G兄了,要是再没有新/老高人来,此坛可改名 -幼儿读物- ♀ (0 bytes) () 09/10/2003 postreply 08:39:00

• xxx/9...9循环节有几位就放几个9 -分子是循环节- ♀ (0 bytes) () 09/10/2003 postreply 11:56:00