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Add 27/21 and 70/80

1st number: 1 6/21, 2nd number: 70/80

27/21 + 70/80 is 121/56.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 80 is 1680
  2. For the 1st fraction, since 21 × 80 = 1680,
    27/21 = 27 × 80/21 × 80 = 2160/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    70/80 = 70 × 21/80 × 21 = 1470/1680
  4. Add the two fractions:
    2160/1680 + 1470/1680 = 2160 + 1470/1680 = 3630/1680
  5. After reducing the fraction, the answer is 121/56
  6. In mixed form: 29/56

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