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Subtract 42/20 from 12/27

1st number: 12/27, 2nd number: 2 2/20

12/27 - 42/20 is -149/90.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 27 and 20 is 540

    Next, find the equivalent fraction of both fractional numbers with denominator 540
  2. For the 1st fraction, since 27 × 20 = 540,
    12/27 = 12 × 20/27 × 20 = 240/540
  3. Likewise, for the 2nd fraction, since 20 × 27 = 540,
    42/20 = 42 × 27/20 × 27 = 1134/540
  4. Subtract the two like fractions:
    240/540 - 1134/540 = 240 - 1134/540 = -894/540
  5. After reducing the fraction, the answer is -149/90

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