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Add 30/40 and 70/21

1st number: 30/40, 2nd number: 3 7/21

30/40 + 70/21 is 49/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 21 is 840
  2. For the 1st fraction, since 40 × 21 = 840,
    30/40 = 30 × 21/40 × 21 = 630/840
  3. Likewise, for the 2nd fraction, since 21 × 40 = 840,
    70/21 = 70 × 40/21 × 40 = 2800/840
  4. Add the two fractions:
    630/840 + 2800/840 = 630 + 2800/840 = 3430/840
  5. After reducing the fraction, the answer is 49/12
  6. In mixed form: 41/12

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