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Subtract 18/21 from 2/54

2/54 - 18/21 is -155/189.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 21 is 378

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 54 × 7 = 378,
    2/54 = 2 × 7/54 × 7 = 14/378
  3. Likewise, for the 2nd fraction, since 21 × 18 = 378,
    18/21 = 18 × 18/21 × 18 = 324/378
  4. Subtract the two like fractions:
    14/378 - 324/378 = 14 - 324/378 = -310/378
  5. After reducing the fraction, the answer is -155/189

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