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Add 15/42 and 15/18

15/42 + 15/18 is 25/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 18 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 42 × 3 = 126,
    15/42 = 15 × 3/42 × 3 = 45/126
  3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
    15/18 = 15 × 7/18 × 7 = 105/126
  4. Add the two like fractions:
    45/126 + 105/126 = 45 + 105/126 = 150/126
  5. 150/126 simplified gives 25/21
  6. So, 15/42 + 15/18 = 25/21
    In mixed form: 14/21

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