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Subtract 42/18 from 8/15

1st number: 8/15, 2nd number: 2 6/18

8/15 - 42/18 is -9/5.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 15 × 6 = 90,
    8/15 = 8 × 6/15 × 6 = 48/90
  3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
    42/18 = 42 × 5/18 × 5 = 210/90
  4. Subtract the two like fractions:
    48/90 - 210/90 = 48 - 210/90 = -162/90
  5. After reducing the fraction, the answer is -9/5

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