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Subtract 10/54 from 10/21

10/21 - 10/54 is 55/189.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 54 is 378
  2. For the 1st fraction, since 21 × 18 = 378,
    10/21 = 10 × 18/21 × 18 = 180/378
  3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
    10/54 = 10 × 7/54 × 7 = 70/378
  4. Subtract the two fractions:
    180/378 - 70/378 = 180 - 70/378 = 110/378
  5. After reducing the fraction, the answer is 55/189

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