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Add 63/80 and 64/90

63/80 + 64/90 is 1079/720.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 90 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 80 × 9 = 720,
    63/80 = 63 × 9/80 × 9 = 567/720
  3. Likewise, for the 2nd fraction, since 90 × 8 = 720,
    64/90 = 64 × 8/90 × 8 = 512/720
  4. Add the two like fractions:
    567/720 + 512/720 = 567 + 512/720 = 1079/720
  5. So, 63/80 + 64/90 = 1079/720
    In mixed form: 1359/720

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