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Add 12/42 and 12/20

12/42 + 12/20 is 31/35.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 20 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 42 × 10 = 420,
    12/42 = 12 × 10/42 × 10 = 120/420
  3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
    12/20 = 12 × 21/20 × 21 = 252/420
  4. Add the two like fractions:
    120/420 + 252/420 = 120 + 252/420 = 372/420
  5. 372/420 simplified gives 31/35
  6. So, 12/42 + 12/20 = 31/35

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