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Add 6/7 and 21/63

6/7 + 21/63 is 25/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 63 is 63

    Next, find the equivalent fraction of both fractional numbers with denominator 63
  2. For the 1st fraction, since 7 × 9 = 63,
    6/7 = 6 × 9/7 × 9 = 54/63
  3. Likewise, for the 2nd fraction, since 63 × 1 = 63,
    21/63 = 21 × 1/63 × 1 = 21/63
  4. Add the two like fractions:
    54/63 + 21/63 = 54 + 21/63 = 75/63
  5. 75/63 simplified gives 25/21
  6. So, 6/7 + 21/63 = 25/21
    In mixed form: 14/21

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