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Subtract 21/54 from 10/15

10/15 - 21/54 is 5/18.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 54 is 270

    Next, find the equivalent fraction of both fractional numbers with denominator 270
  2. For the 1st fraction, since 15 × 18 = 270,
    10/15 = 10 × 18/15 × 18 = 180/270
  3. Likewise, for the 2nd fraction, since 54 × 5 = 270,
    21/54 = 21 × 5/54 × 5 = 105/270
  4. Subtract the two like fractions:
    180/270 - 105/270 = 180 - 105/270 = 75/270
  5. After reducing the fraction, the answer is 5/18

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