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Add 5/42 and 18/40

5/42 + 18/40 is 239/420.

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,
    5/42 = 5 × 20/42 × 20 = 100/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    18/40 = 18 × 21/40 × 21 = 378/840
  4. Add the two like fractions:
    100/840 + 378/840 = 100 + 378/840 = 478/840
  5. 478/840 simplified gives 239/420
  6. So, 5/42 + 18/40 = 239/420

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