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Add 30/70 and 4/12

30/70 + 4/12 is 16/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 12 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 70 × 6 = 420,
    30/70 = 30 × 6/70 × 6 = 180/420
  3. Likewise, for the 2nd fraction, since 12 × 35 = 420,
    4/12 = 4 × 35/12 × 35 = 140/420
  4. Add the two like fractions:
    180/420 + 140/420 = 180 + 140/420 = 320/420
  5. 320/420 simplified gives 16/21
  6. So, 30/70 + 4/12 = 16/21

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