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Add 6/7 and 21/30

6/7 + 21/30 is 109/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 30 is 210
  2. For the 1st fraction, since 7 × 30 = 210,
    6/7 = 6 × 30/7 × 30 = 180/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    21/30 = 21 × 7/30 × 7 = 147/210
  4. Add the two fractions:
    180/210 + 147/210 = 180 + 147/210 = 327/210
  5. After reducing the fraction, the answer is 109/70
  6. In mixed form: 139/70

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