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Add 3/4 and 42/70

3/4 + 42/70 is 27/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 70 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 4 × 35 = 140,
    3/4 = 3 × 35/4 × 35 = 105/140
  3. Likewise, for the 2nd fraction, since 70 × 2 = 140,
    42/70 = 42 × 2/70 × 2 = 84/140
  4. Add the two like fractions:
    105/140 + 84/140 = 105 + 84/140 = 189/140
  5. 189/140 simplified gives 27/20
  6. So, 3/4 + 42/70 = 27/20
    In mixed form: 17/20

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