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Add 18/20 and 15/28

18/20 + 15/28 is 201/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 28 is 140
  2. For the 1st fraction, since 20 × 7 = 140,
    18/20 = 18 × 7/20 × 7 = 126/140
  3. Likewise, for the 2nd fraction, since 28 × 5 = 140,
    15/28 = 15 × 5/28 × 5 = 75/140
  4. Add the two fractions:
    126/140 + 75/140 = 126 + 75/140 = 201/140
  5. In mixed form: 161/140

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