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Add 15/42 and 21/8

1st number: 15/42, 2nd number: 2 5/8

15/42 + 21/8 is 167/56.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 8 is 168

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 42 × 4 = 168,
    15/42 = 15 × 4/42 × 4 = 60/168
  3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
    21/8 = 21 × 21/8 × 21 = 441/168
  4. Add the two like fractions:
    60/168 + 441/168 = 60 + 441/168 = 501/168
  5. 501/168 simplified gives 167/56
  6. So, 15/42 + 21/8 = 167/56
    In mixed form: 255/56

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