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Add 4/21 and 7/27

4/21 + 7/27 is 85/189.

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,
    4/21 = 4 × 9/21 × 9 = 36/189
  3. Likewise, for the 2nd fraction, since 27 × 7 = 189,
    7/27 = 7 × 7/27 × 7 = 49/189
  4. Add the two fractions:
    36/189 + 49/189 = 36 + 49/189 = 85/189

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