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Add 28/72 and 18/15

1st number: 28/72, 2nd number: 1 3/15

28/72 + 18/15 is 143/90.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 72 × 5 = 360,
    28/72 = 28 × 5/72 × 5 = 140/360
  3. Likewise, for the 2nd fraction, since 15 × 24 = 360,
    18/15 = 18 × 24/15 × 24 = 432/360
  4. Add the two like fractions:
    140/360 + 432/360 = 140 + 432/360 = 572/360
  5. 572/360 simplified gives 143/90
  6. So, 28/72 + 18/15 = 143/90
    In mixed form: 153/90

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