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Add 28/42 and 15/40

28/42 + 15/40 is 25/24.

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,
    15/40 = 15 × 21/40 × 21 = 315/840
  4. Add the two like fractions:
    560/840 + 315/840 = 560 + 315/840 = 875/840
  5. 875/840 simplified gives 25/24
  6. So, 28/42 + 15/40 = 25/24
    In mixed form: 11/24

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