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8 August, 21:28

What is 1/4-1/7 when sub

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  1. 8 August, 21:35
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    One Fourth minus one Seventh is three twenty eighths.
  2. 8 August, 21:47
    0
    1/4-1/7

    1) find the least common multiple of 4 and 7: 28

    2) since 4*7 is 28, 1*4=4 and 1*7=7

    the new fractions are 7/28-4/28

    subtract and get 3/28

    therefore, 1/4-1/7 is 3/28
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