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Subtract 18/7 from 1/28

1st number: 1/28, 2nd number: 2 4/7

1/28 - 18/7 is -71/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 7 is 28

    Next, find the equivalent fraction of both fractional numbers with denominator 28
  2. For the 1st fraction, since 28 × 1 = 28,
    1/28 = 1 × 1/28 × 1 = 1/28
  3. Likewise, for the 2nd fraction, since 7 × 4 = 28,
    18/7 = 18 × 4/7 × 4 = 72/28
  4. Subtract the two like fractions:
    1/28 - 72/28 = 1 - 72/28 = -71/28

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