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Add 20/5 and 81/42

1st number: 4 0/5, 2nd number: 1 39/42

20/5 + 81/42 is 83/14.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 42 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 5 × 42 = 210,
    20/5 = 20 × 42/5 × 42 = 840/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    81/42 = 81 × 5/42 × 5 = 405/210
  4. Add the two like fractions:
    840/210 + 405/210 = 840 + 405/210 = 1245/210
  5. 1245/210 simplified gives 83/14
  6. So, 20/5 + 81/42 = 83/14
    In mixed form: 513/14

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