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Math Help - Fractions in a probablity problem?

  1. #1
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    Fractions in a probablity problem?

    So, I've been doing problems on probablity. Stuff like:

    12 over 9 = x over 7, solving for x.

    But I just got to a question that was this:

    2/7 over 3/4 = 5/6 over x

    I have NO idea how to even begin. Help? D:
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  2. #2
    Super Member Showcase_22's Avatar
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    \frac{\frac{2}{7}}{\frac{3}{4}}=\frac{\frac{5}{6}}  {x}

    \frac{2}{7}x=\frac{15}{24}

    ...and I think you can take it from here.
    Last edited by Showcase_22; April 15th 2009 at 03:17 PM. Reason: tihnk?
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  3. #3
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    e^(i*pi)'s Avatar
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    Quote Originally Posted by Showcase_22 View Post
    \frac{\frac{2}{7}}{\frac{3}{4}}=\frac{\frac{5}{6}}  {x}

    \frac{2}{7}x=\frac{15}{24}

    ...and I think you can take it from here.
    \frac{\frac{a}{b}}{\frac{c}{d}} = \frac{a}{b} \times \frac{d}{c}

    For your example do what the guy above said
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