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Add 7/21 and 21/18

1st number: 7/21, 2nd number: 1 3/18

7/21 + 21/18 is 3/2.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 18 is 126
  2. For the 1st fraction, since 21 × 6 = 126,
    7/21 = 7 × 6/21 × 6 = 42/126
  3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
    21/18 = 21 × 7/18 × 7 = 147/126
  4. Add the two fractions:
    42/126 + 147/126 = 42 + 147/126 = 189/126
  5. 189/126 simplified gives 3/2
  6. So, 7/21 + 21/18 = 3/2
    In mixed form: 11/2

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