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Subtract 1/15 from 5/21

5/21 - 1/15 is 6/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 15 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 21 × 5 = 105,
    5/21 = 5 × 5/21 × 5 = 25/105
  3. Likewise, for the 2nd fraction, since 15 × 7 = 105,
    1/15 = 1 × 7/15 × 7 = 7/105
  4. Subtract the two like fractions:
    25/105 - 7/105 = 25 - 7/105 = 18/105
  5. After reducing the fraction, the answer is 6/35

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