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Add 10/21 and 20/36

10/21 + 20/36 is 65/63.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 36 is 252
  2. For the 1st fraction, since 21 × 12 = 252,
    10/21 = 10 × 12/21 × 12 = 120/252
  3. Likewise, for the 2nd fraction, since 36 × 7 = 252,
    20/36 = 20 × 7/36 × 7 = 140/252
  4. Add the two fractions:
    120/252 + 140/252 = 120 + 140/252 = 260/252
  5. After reducing the fraction, the answer is 65/63
  6. In mixed form: 12/63

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