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Add 18/28 and 18/35

18/28 + 18/35 is 81/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 35 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 35 × 4 = 140,
    18/35 = 18 × 4/35 × 4 = 72/140
  4. Add the two fractions:
    90/140 + 72/140 = 90 + 72/140 = 162/140
  5. 162/140 simplified gives 81/70
  6. So, 18/28 + 18/35 = 81/70
    In mixed form: 111/70

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