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Add 1/15 and 28/21

1st number: 1/15, 2nd number: 1 7/21

1/15 + 28/21 is 7/5.

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,
    1/15 = 1 × 7/15 × 7 = 7/105
  3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
    28/21 = 28 × 5/21 × 5 = 140/105
  4. Add the two like fractions:
    7/105 + 140/105 = 7 + 140/105 = 147/105
  5. 147/105 simplified gives 7/5
  6. So, 1/15 + 28/21 = 7/5
    In mixed form: 12/5

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