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Add 12/21 and 72/49

1st number: 12/21, 2nd number: 1 23/49

12/21 + 72/49 is 100/49.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 49 is 147
  2. For the 1st fraction, since 21 × 7 = 147,
    12/21 = 12 × 7/21 × 7 = 84/147
  3. Likewise, for the 2nd fraction, since 49 × 3 = 147,
    72/49 = 72 × 3/49 × 3 = 216/147
  4. Add the two fractions:
    84/147 + 216/147 = 84 + 216/147 = 300/147
  5. After reducing the fraction, the answer is 100/49
  6. In mixed form: 22/49

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