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Add 21/45 and 63/64

21/45 + 63/64 is 1393/960.

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,
    21/45 = 21 × 64/45 × 64 = 1344/2880
  3. Likewise, for the 2nd fraction, since 64 × 45 = 2880,
    63/64 = 63 × 45/64 × 45 = 2835/2880
  4. Add the two like fractions:
    1344/2880 + 2835/2880 = 1344 + 2835/2880 = 4179/2880
  5. 4179/2880 simplified gives 1393/960
  6. So, 21/45 + 63/64 = 1393/960
    In mixed form: 1433/960

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