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Add 72/42 and 20/40

1st number: 1 30/42, 2nd number: 20/40

72/42 + 20/40 is 31/14.

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,
    72/42 = 72 × 20/42 × 20 = 1440/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    20/40 = 20 × 21/40 × 21 = 420/840
  4. Add the two like fractions:
    1440/840 + 420/840 = 1440 + 420/840 = 1860/840
  5. 1860/840 simplified gives 31/14
  6. So, 72/42 + 20/40 = 31/14
    In mixed form: 23/14

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