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Add 20/21 and 7/27

20/21 + 7/27 is 229/189.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 27 is 189
  2. For the 1st fraction, since 21 × 9 = 189,
    20/21 = 20 × 9/21 × 9 = 180/189
  3. Likewise, for the 2nd fraction, since 27 × 7 = 189,
    7/27 = 7 × 7/27 × 7 = 49/189
  4. Add the two fractions:
    180/189 + 49/189 = 180 + 49/189 = 229/189
  5. So, 20/21 + 7/27 = 229/189
    In mixed form: 140/189

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