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Subtract 28/56 from 7/30

7/30 - 28/56 is -4/15.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 56 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 30 × 28 = 840,
    7/30 = 7 × 28/30 × 28 = 196/840
  3. Likewise, for the 2nd fraction, since 56 × 15 = 840,
    28/56 = 28 × 15/56 × 15 = 420/840
  4. Subtract the two like fractions:
    196/840 - 420/840 = 196 - 420/840 = -224/840
  5. After reducing the fraction, the answer is -4/15

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