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Subtract 2/21 from 7/15

7/15 - 2/21 is 13/35.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 15 × 7 = 105,
    7/15 = 7 × 7/15 × 7 = 49/105
  3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
    2/21 = 2 × 5/21 × 5 = 10/105
  4. Subtract the two like fractions:
    49/105 - 10/105 = 49 - 10/105 = 39/105
  5. After reducing the fraction, the answer is 13/35

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