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Add 54/42 and 20/81

1st number: 1 12/42, 2nd number: 20/81

54/42 + 20/81 is 869/567.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 81 is 1134

    Next, find the equivalent fraction of both fractional numbers with denominator 1134
  2. For the 1st fraction, since 42 × 27 = 1134,
    54/42 = 54 × 27/42 × 27 = 1458/1134
  3. Likewise, for the 2nd fraction, since 81 × 14 = 1134,
    20/81 = 20 × 14/81 × 14 = 280/1134
  4. Add the two like fractions:
    1458/1134 + 280/1134 = 1458 + 280/1134 = 1738/1134
  5. 1738/1134 simplified gives 869/567
  6. So, 54/42 + 20/81 = 869/567
    In mixed form: 1302/567

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