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Add 21/18 and 5/7

1st number: 1 3/18, 2nd number: 5/7

21/18 + 5/7 is 79/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 7 is 126
  2. For the 1st fraction, since 18 × 7 = 126,
    21/18 = 21 × 7/18 × 7 = 147/126
  3. Likewise, for the 2nd fraction, since 7 × 18 = 126,
    5/7 = 5 × 18/7 × 18 = 90/126
  4. Add the two fractions:
    147/126 + 90/126 = 147 + 90/126 = 237/126
  5. After reducing the fraction, the answer is 79/42
  6. In mixed form: 137/42

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