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Add 80/12 and 81/72

1st number: 6 8/12, 2nd number: 1 9/72

80/12 + 81/72 is 187/24.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 72 is 72
  2. For the 1st fraction, since 12 × 6 = 72,
    80/12 = 80 × 6/12 × 6 = 480/72
  3. Likewise, for the 2nd fraction, since 72 × 1 = 72,
    81/72 = 81 × 1/72 × 1 = 81/72
  4. Add the two fractions:
    480/72 + 81/72 = 480 + 81/72 = 561/72
  5. 561/72 simplified gives 187/24
  6. So, 80/12 + 81/72 = 187/24
    In mixed form: 719/24

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