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Add 25/21 and 70/40

1st number: 1 4/21, 2nd number: 1 30/40

25/21 + 70/40 is 247/84.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 40 is 840
  2. For the 1st fraction, since 21 × 40 = 840,
    25/21 = 25 × 40/21 × 40 = 1000/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    70/40 = 70 × 21/40 × 21 = 1470/840
  4. Add the two fractions:
    1000/840 + 1470/840 = 1000 + 1470/840 = 2470/840
  5. After reducing the fraction, the answer is 247/84
  6. In mixed form: 279/84

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