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Subtract 42/15 from 2/18

1st number: 2/18, 2nd number: 2 12/15

2/18 - 42/15 is -121/45.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 15 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 18 × 5 = 90,
    2/18 = 2 × 5/18 × 5 = 10/90
  3. Likewise, for the 2nd fraction, since 15 × 6 = 90,
    42/15 = 42 × 6/15 × 6 = 252/90
  4. Subtract the two like fractions:
    10/90 - 252/90 = 10 - 252/90 = -242/90
  5. After reducing the fraction, the answer is -121/45

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