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Add 7/18 and 18/21

7/18 + 18/21 is 157/126.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 21 is 126
  2. For the 1st fraction, since 18 × 7 = 126,
    7/18 = 7 × 7/18 × 7 = 49/126
  3. Likewise, for the 2nd fraction, since 21 × 6 = 126,
    18/21 = 18 × 6/21 × 6 = 108/126
  4. Add the two fractions:
    49/126 + 108/126 = 49 + 108/126 = 157/126
  5. So, 7/18 + 18/21 = 157/126
    In mixed form: 131/126

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