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Add 28/30 and 18/42

28/30 + 18/42 is 143/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 42 is 210
  2. For the 1st fraction, since 30 × 7 = 210,
    28/30 = 28 × 7/30 × 7 = 196/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    18/42 = 18 × 5/42 × 5 = 90/210
  4. Add the two fractions:
    196/210 + 90/210 = 196 + 90/210 = 286/210
  5. After reducing the fraction, the answer is 143/105
  6. In mixed form: 138/105

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