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Add 70/20 and 21/5

1st number: 3 10/20, 2nd number: 4 1/5

70/20 + 21/5 is 77/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 5 is 20

    Next, find the equivalent fraction of both fractional numbers with denominator 20
  2. For the 1st fraction, since 20 × 1 = 20,
    70/20 = 70 × 1/20 × 1 = 70/20
  3. Likewise, for the 2nd fraction, since 5 × 4 = 20,
    21/5 = 21 × 4/5 × 4 = 84/20
  4. Add the two like fractions:
    70/20 + 84/20 = 70 + 84/20 = 154/20
  5. 154/20 simplified gives 77/10
  6. So, 70/20 + 21/5 = 77/10
    In mixed form: 77/10

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