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Subtract 3/7 from 9/30

9/30 - 3/7 is -9/70.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 30 × 7 = 210,
    9/30 = 9 × 7/30 × 7 = 63/210
  3. Likewise, for the 2nd fraction, since 7 × 30 = 210,
    3/7 = 3 × 30/7 × 30 = 90/210
  4. Subtract the two like fractions:
    63/210 - 90/210 = 63 - 90/210 = -27/210
  5. After reducing the fraction, the answer is -9/70

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