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Add 21/27 and 2/7

21/27 + 2/7 is 67/63.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 27 and 7 is 189

    Next, find the equivalent fraction of both fractional numbers with denominator 189
  2. For the 1st fraction, since 27 × 7 = 189,
    21/27 = 21 × 7/27 × 7 = 147/189
  3. Likewise, for the 2nd fraction, since 7 × 27 = 189,
    2/7 = 2 × 27/7 × 27 = 54/189
  4. Add the two like fractions:
    147/189 + 54/189 = 147 + 54/189 = 201/189
  5. 201/189 simplified gives 67/63
  6. So, 21/27 + 2/7 = 67/63
    In mixed form: 14/63

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