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Add 30/21 and 5/12

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

30/21 + 5/12 is 155/84.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 21 × 4 = 84,
    30/21 = 30 × 4/21 × 4 = 120/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    5/12 = 5 × 7/12 × 7 = 35/84
  4. Add the two like fractions:
    120/84 + 35/84 = 120 + 35/84 = 155/84
  5. So, 30/21 + 5/12 = 155/84
    In mixed form: 171/84

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