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Add 28/42 and 4/72

28/42 + 4/72 is 13/18.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 72 is 504

    Next, find the equivalent fraction of both fractional numbers with denominator 504
  2. For the 1st fraction, since 42 × 12 = 504,
    28/42 = 28 × 12/42 × 12 = 336/504
  3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
    4/72 = 4 × 7/72 × 7 = 28/504
  4. Add the two like fractions:
    336/504 + 28/504 = 336 + 28/504 = 364/504
  5. 364/504 simplified gives 13/18
  6. So, 28/42 + 4/72 = 13/18

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