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Add 18/28 and 15/20

18/28 + 15/20 is 39/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 20 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 20 × 7 = 140,
    15/20 = 15 × 7/20 × 7 = 105/140
  4. Add the two fractions:
    90/140 + 105/140 = 90 + 105/140 = 195/140
  5. After reducing the fraction, the answer is 39/28
  6. In mixed form: 111/28

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