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Math Help - fractions

  1. #1
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    fractions

    hi this is my question:

    4\frac{4}{21} X 4

    could someone explain how i would do this?
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  2. #2
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    e^(i*pi)'s Avatar
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    Quote Originally Posted by andyboy179 View Post
    hi this is my question:

    4\frac{4}{21} X 4

    could someone explain how i would do this?
    Treat 4 as 4/1. When multiplying fractions multiply both top and bottom: \frac{a}{c} \cdot \frac{b}{d} = \frac{ab}{cd}

    Also do you mean  4+\frac{4}{21} or 4 \times \frac{4}{21} in the first term? I will guess the former

    <br />
4(4+\frac{4}{21}) = 16 + \frac{16}{21} = \frac{16 \cdot 21 + 16}{21} = \frac{352}{21}
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  3. #3
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    Quote Originally Posted by e^(i*pi) View Post
    Treat 4 as 4/1. When multiplying fractions multiply both top and bottom: \frac{a}{c} \cdot \frac{b}{d} = \frac{ab}{cd}

    Also do you mean  4+\frac{4}{21} or 4 \times \frac{4}{21} in the first term? I will guess the former

    <br />
4(4+\frac{4}{21}) = 16 + \frac{16}{21} = \frac{16 \cdot 21 + 16}{21} = \frac{352}{21}

    i don't understand!!!!
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  4. #4
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    i get it now! thanks!
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