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Add 21/14 and 54/42

1st number: 1 7/14, 2nd number: 1 12/42

21/14 + 54/42 is 39/14.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 14 and 42 is 42

    Next, find the equivalent fraction of both fractional numbers with denominator 42
  2. For the 1st fraction, since 14 × 3 = 42,
    21/14 = 21 × 3/14 × 3 = 63/42
  3. Likewise, for the 2nd fraction, since 42 × 1 = 42,
    54/42 = 54 × 1/42 × 1 = 54/42
  4. Add the two like fractions:
    63/42 + 54/42 = 63 + 54/42 = 117/42
  5. 117/42 simplified gives 39/14
  6. So, 21/14 + 54/42 = 39/14
    In mixed form: 211/14

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