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Add 18/30 and 3/42

18/30 + 3/42 is 47/70.

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,
    18/30 = 18 × 7/30 × 7 = 126/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    3/42 = 3 × 5/42 × 5 = 15/210
  4. Add the two fractions:
    126/210 + 15/210 = 126 + 15/210 = 141/210
  5. 141/210 simplified gives 47/70
  6. So, 18/30 + 3/42 = 47/70

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