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Add 21/12 and 5/21

1st number: 1 9/12, 2nd number: 5/21

21/12 + 5/21 is 167/84.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 21 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 12 × 7 = 84,
    21/12 = 21 × 7/12 × 7 = 147/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    5/21 = 5 × 4/21 × 4 = 20/84
  4. Add the two like fractions:
    147/84 + 20/84 = 147 + 20/84 = 167/84
  5. So, 21/12 + 5/21 = 167/84
    In mixed form: 183/84

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