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Subtract 28/30 from 4/7

4/7 - 28/30 is -38/105.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 30 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 7 × 30 = 210,
    4/7 = 4 × 30/7 × 30 = 120/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    28/30 = 28 × 7/30 × 7 = 196/210
  4. Subtract the two like fractions:
    120/210 - 196/210 = 120 - 196/210 = -76/210
  5. After reducing the fraction, the answer is -38/105

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