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Add 4/15 and 10/21

4/15 + 10/21 is 26/35.

Steps for adding 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,
    4/15 = 4 × 7/15 × 7 = 28/105
  3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
    10/21 = 10 × 5/21 × 5 = 50/105
  4. Add the two like fractions:
    28/105 + 50/105 = 28 + 50/105 = 78/105
  5. 78/105 simplified gives 26/35
  6. So, 4/15 + 10/21 = 26/35

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