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Add 63/70 and 9/80

63/70 + 9/80 is 81/80.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 80 is 560

    Next, find the equivalent fraction of both fractional numbers with denominator 560
  2. For the 1st fraction, since 70 × 8 = 560,
    63/70 = 63 × 8/70 × 8 = 504/560
  3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
    9/80 = 9 × 7/80 × 7 = 63/560
  4. Add the two like fractions:
    504/560 + 63/560 = 504 + 63/560 = 567/560
  5. 567/560 simplified gives 81/80
  6. So, 63/70 + 9/80 = 81/80
    In mixed form: 11/80

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