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Series and sequences

  1. Apr 21, 2010 #1
    1. The problem statement, all variables and given/known data


    Express 7.54545454545 . . . as a rational number, in the form p/q
    where p and q are positive integers with no common factors.
    p = ? and q = ?


    This problem is nothing like I've seen before, so I don't even have a clue on how to start it.
     
  2. jcsd
  3. Apr 21, 2010 #2
    There is a usual method of multiplying the number by 100 and subtracting and then dividing a few things to get a result (or tweaking it a little bit to fit your number). Have you seen this before? What methods have you used in the class or book you got this from? That is usually a good start.
     
  4. Apr 21, 2010 #3
    Well I've seen the general theories ans tests but our teacher never gave us an example or a situation like this one, that is why I can't figure out how to even start the problem.
     
  5. Apr 21, 2010 #4

    Dick

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    Try what VeeEight suggested. If s=7.54545454545 . . . what is 100*s-s?
     
  6. Apr 22, 2010 #5
    Yeah I posted that,but they deleted it and I got in trouble for giving them full answers so try doing something with s and SOMETHINGs and SUBTRACT them to get something S=something here. Then divide.
     
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