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Add 30/70 and 28/30

30/70 + 28/30 is 143/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 30 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 70 × 3 = 210,
    30/70 = 30 × 3/70 × 3 = 90/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    28/30 = 28 × 7/30 × 7 = 196/210
  4. Add the two like fractions:
    90/210 + 196/210 = 90 + 196/210 = 286/210
  5. 286/210 simplified gives 143/105
  6. So, 30/70 + 28/30 = 143/105
    In mixed form: 138/105

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