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Add 5/20 and 70/42

1st number: 5/20, 2nd number: 1 28/42

5/20 + 70/42 is 23/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 42 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 20 × 21 = 420,
    5/20 = 5 × 21/20 × 21 = 105/420
  3. Likewise, for the 2nd fraction, since 42 × 10 = 420,
    70/42 = 70 × 10/42 × 10 = 700/420
  4. Add the two like fractions:
    105/420 + 700/420 = 105 + 700/420 = 805/420
  5. 805/420 simplified gives 23/12
  6. So, 5/20 + 70/42 = 23/12
    In mixed form: 111/12

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