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Add 12/20 and 40/63

12/20 + 40/63 is 389/315.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 63 is 1260

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 20 × 63 = 1260,
    12/20 = 12 × 63/20 × 63 = 756/1260
  3. Likewise, for the 2nd fraction, since 63 × 20 = 1260,
    40/63 = 40 × 20/63 × 20 = 800/1260
  4. Add the two like fractions:
    756/1260 + 800/1260 = 756 + 800/1260 = 1556/1260
  5. 1556/1260 simplified gives 389/315
  6. So, 12/20 + 40/63 = 389/315
    In mixed form: 174/315

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