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Add 6/21 and 18/30

6/21 + 18/30 is 31/35.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 30 is 210
  2. For the 1st fraction, since 21 × 10 = 210,
    6/21 = 6 × 10/21 × 10 = 60/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    18/30 = 18 × 7/30 × 7 = 126/210
  4. Add the two fractions:
    60/210 + 126/210 = 60 + 126/210 = 186/210
  5. After reducing the fraction, the answer is 31/35

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