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Add 28/42 and 10/40

28/42 + 10/40 is 11/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 40 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 42 × 20 = 840,
    28/42 = 28 × 20/42 × 20 = 560/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    10/40 = 10 × 21/40 × 21 = 210/840
  4. Add the two like fractions:
    560/840 + 210/840 = 560 + 210/840 = 770/840
  5. 770/840 simplified gives 11/12
  6. So, 28/42 + 10/40 = 11/12

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