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Add 20/35 and 12/72

20/35 + 12/72 is 31/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 35 and 72 is 2520

    Next, find the equivalent fraction of both fractional numbers with denominator 2520
  2. For the 1st fraction, since 35 × 72 = 2520,
    20/35 = 20 × 72/35 × 72 = 1440/2520
  3. Likewise, for the 2nd fraction, since 72 × 35 = 2520,
    12/72 = 12 × 35/72 × 35 = 420/2520
  4. Add the two like fractions:
    1440/2520 + 420/2520 = 1440 + 420/2520 = 1860/2520
  5. 1860/2520 simplified gives 31/42
  6. So, 20/35 + 12/72 = 31/42

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