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Add 70/21 and 90/56

1st number: 3 7/21, 2nd number: 1 34/56

70/21 + 90/56 is 415/84.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 56 is 168
  2. For the 1st fraction, since 21 × 8 = 168,
    70/21 = 70 × 8/21 × 8 = 560/168
  3. Likewise, for the 2nd fraction, since 56 × 3 = 168,
    90/56 = 90 × 3/56 × 3 = 270/168
  4. Add the two fractions:
    560/168 + 270/168 = 560 + 270/168 = 830/168
  5. After reducing the fraction, the answer is 415/84
  6. In mixed form: 479/84

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