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Subtract 90/12 from 18/15

1st number: 1 3/15, 2nd number: 7 6/12

18/15 - 90/12 is -63/10.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 12 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 15 × 4 = 60,
    18/15 = 18 × 4/15 × 4 = 72/60
  3. Likewise, for the 2nd fraction, since 12 × 5 = 60,
    90/12 = 90 × 5/12 × 5 = 450/60
  4. Subtract the two like fractions:
    72/60 - 450/60 = 72 - 450/60 = -378/60
  5. After reducing the fraction, the answer is -63/10

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