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Add 40/28 and 1/21

1st number: 1 12/28, 2nd number: 1/21

40/28 + 1/21 is 31/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 21 is 84
  2. For the 1st fraction, since 28 × 3 = 84,
    40/28 = 40 × 3/28 × 3 = 120/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    1/21 = 1 × 4/21 × 4 = 4/84
  4. Add the two fractions:
    120/84 + 4/84 = 120 + 4/84 = 124/84
  5. After reducing the fraction, the answer is 31/21
  6. In mixed form: 110/21

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