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Add 3/15 and 21/18

1st number: 3/15, 2nd number: 1 3/18

3/15 + 21/18 is 41/30.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 18 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 15 × 6 = 90,
    3/15 = 3 × 6/15 × 6 = 18/90
  3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
    21/18 = 21 × 5/18 × 5 = 105/90
  4. Add the two like fractions:
    18/90 + 105/90 = 18 + 105/90 = 123/90
  5. 123/90 simplified gives 41/30
  6. So, 3/15 + 21/18 = 41/30
    In mixed form: 111/30

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