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Add 1/42 and 15/40

1/42 + 15/40 is 67/168.

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,
    1/42 = 1 × 20/42 × 20 = 20/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    15/40 = 15 × 21/40 × 21 = 315/840
  4. Add the two like fractions:
    20/840 + 315/840 = 20 + 315/840 = 335/840
  5. 335/840 simplified gives 67/168
  6. So, 1/42 + 15/40 = 67/168

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