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Subtract 63/7 from 18/15

1st number: 1 3/15, 2nd number: 9 0/7

18/15 - 63/7 is -39/5.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 7 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 15 × 7 = 105,
    18/15 = 18 × 7/15 × 7 = 126/105
  3. Likewise, for the 2nd fraction, since 7 × 15 = 105,
    63/7 = 63 × 15/7 × 15 = 945/105
  4. Subtract the two like fractions:
    126/105 - 945/105 = 126 - 945/105 = -819/105
  5. After reducing the fraction, the answer is -39/5

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