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Subtract 14/21 from 3/5

3/5 - 14/21 is -1/15.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 21 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 5 × 21 = 105,
    3/5 = 3 × 21/5 × 21 = 63/105
  3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
    14/21 = 14 × 5/21 × 5 = 70/105
  4. Subtract the two like fractions:
    63/105 - 70/105 = 63 - 70/105 = -7/105
  5. After reducing the fraction, the answer is -1/15

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