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Add 20/45 and 36/64

20/45 + 36/64 is 145/144.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 64 is 2880

    Next, find the equivalent fraction of both fractional numbers with denominator 2880
  2. For the 1st fraction, since 45 × 64 = 2880,
    20/45 = 20 × 64/45 × 64 = 1280/2880
  3. Likewise, for the 2nd fraction, since 64 × 45 = 2880,
    36/64 = 36 × 45/64 × 45 = 1620/2880
  4. Add the two like fractions:
    1280/2880 + 1620/2880 = 1280 + 1620/2880 = 2900/2880
  5. 2900/2880 simplified gives 145/144
  6. So, 20/45 + 36/64 = 145/144
    In mixed form: 11/144

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