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Add 72/20 and 5/42

1st number: 3 12/20, 2nd number: 5/42

72/20 + 5/42 is 781/210.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 20 × 21 = 420,
    72/20 = 72 × 21/20 × 21 = 1512/420
  3. Likewise, for the 2nd fraction, since 42 × 10 = 420,
    5/42 = 5 × 10/42 × 10 = 50/420
  4. Add the two like fractions:
    1512/420 + 50/420 = 1512 + 50/420 = 1562/420
  5. 1562/420 simplified gives 781/210
  6. So, 72/20 + 5/42 = 781/210
    In mixed form: 3151/210

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