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Add 21/15 and 3/7

1st number: 1 6/15, 2nd number: 3/7

21/15 + 3/7 is 64/35.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 7 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 15 × 7 = 105,
    21/15 = 21 × 7/15 × 7 = 147/105
  3. Likewise, for the 2nd fraction, since 7 × 15 = 105,
    3/7 = 3 × 15/7 × 15 = 45/105
  4. Add the two like fractions:
    147/105 + 45/105 = 147 + 45/105 = 192/105
  5. 192/105 simplified gives 64/35
  6. So, 21/15 + 3/7 = 64/35
    In mixed form: 129/35

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