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Add 80/15 and 21/12

1st number: 5 5/15, 2nd number: 1 9/12

80/15 + 21/12 is 85/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 12 is 60
  2. For the 1st fraction, since 15 × 4 = 60,
    80/15 = 80 × 4/15 × 4 = 320/60
  3. Likewise, for the 2nd fraction, since 12 × 5 = 60,
    21/12 = 21 × 5/12 × 5 = 105/60
  4. Add the two fractions:
    320/60 + 105/60 = 320 + 105/60 = 425/60
  5. 425/60 simplified gives 85/12
  6. So, 80/15 + 21/12 = 85/12
    In mixed form: 71/12

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