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  1. #1
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    Smile Need more help

    What is the difference between 126 1/4 and 78 2/3
    A) 58 5/12
    B) 57 7/12
    C) 48 1/3
    D) 47 7/12

    My answer is d

    What do you think?
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  2. #2
    MHF Contributor Quick's Avatar
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    Before anyone goes on to answer your question, I have a question for you. Are you learning anything? Has this site been a useful guide or just a homework checker?
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  3. #3
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    This site been very useful and helpful toward my learning of math
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  4. #4
    MHF Contributor Quick's Avatar
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    Quote Originally Posted by Angel King
    This site been very useful and helpful toward my learning of math
    [sarcasm] suuuuuuuuuuure [/sarcasm]

    What is the difference between 126 1/4 and 78 2/3
    we have the numbers $\displaystyle 126\frac{1}{4}$ and $\displaystyle 78\frac{2}{3}$

    we have to find the value of $\displaystyle 126\frac{1}{4}-78\frac{2}{3}$

    simplify: $\displaystyle \frac{1+126\times4}{4}-\frac{2+78\times3}{3}$

    multiply: $\displaystyle \frac{1+504}{4}-\frac{2+234}{3}$

    add: $\displaystyle \frac{505}{4}-\frac{236}{3}$

    find like denominators: $\displaystyle \frac{505\times3}{4\times3}-\frac{236\times4}{3\times4}$

    multiply: $\displaystyle \frac{1515}{12}-\frac{944}{12}$

    combine fractions: $\displaystyle \frac{1515-944}{12}$

    subtract: $\displaystyle \frac{571}{12}$

    simplify: $\displaystyle \boxed{47\frac{7}{12}}$

    therefore the answer is d
    Last edited by Quick; Aug 24th 2006 at 06:23 PM.
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