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Add 20/21 and 7/63

20/21 + 7/63 is 67/63.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 63 is 63
  2. For the 1st fraction, since 21 × 3 = 63,
    20/21 = 20 × 3/21 × 3 = 60/63
  3. Likewise, for the 2nd fraction, since 63 × 1 = 63,
    7/63 = 7 × 1/63 × 1 = 7/63
  4. Add the two fractions:
    60/63 + 7/63 = 60 + 7/63 = 67/63
  5. In mixed form: 14/63

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