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Add 18/28 and 30/70

18/28 + 30/70 is 15/14.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 70 is 140
  2. For the 1st fraction, since 28 × 5 = 140,
    18/28 = 18 × 5/28 × 5 = 90/140
  3. Likewise, for the 2nd fraction, since 70 × 2 = 140,
    30/70 = 30 × 2/70 × 2 = 60/140
  4. Add the two fractions:
    90/140 + 60/140 = 90 + 60/140 = 150/140
  5. 150/140 simplified gives 15/14
  6. So, 18/28 + 30/70 = 15/14
    In mixed form: 11/14

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