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Add 42/15 and 28/72

1st number: 2 12/15, 2nd number: 28/72

42/15 + 28/72 is 287/90.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 72 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 15 × 24 = 360,
    42/15 = 42 × 24/15 × 24 = 1008/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    28/72 = 28 × 5/72 × 5 = 140/360
  4. Add the two like fractions:
    1008/360 + 140/360 = 1008 + 140/360 = 1148/360
  5. 1148/360 simplified gives 287/90
  6. So, 42/15 + 28/72 = 287/90
    In mixed form: 317/90

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