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Subtract 8/7 from 15/30

1st number: 15/30, 2nd number: 1 1/7

15/30 - 8/7 is -9/14.

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,
    15/30 = 15 × 7/30 × 7 = 105/210
  3. Likewise, for the 2nd fraction, since 7 × 30 = 210,
    8/7 = 8 × 30/7 × 30 = 240/210
  4. Subtract the two like fractions:
    105/210 - 240/210 = 105 - 240/210 = -135/210
  5. After reducing the fraction, the answer is -9/14

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