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Add 80/15 and 21/18

1st number: 5 5/15, 2nd number: 1 3/18

80/15 + 21/18 is 13/2.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 18 is 90
  2. For the 1st fraction, since 15 × 6 = 90,
    80/15 = 80 × 6/15 × 6 = 480/90
  3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
    21/18 = 21 × 5/18 × 5 = 105/90
  4. Add the two fractions:
    480/90 + 105/90 = 480 + 105/90 = 585/90
  5. 585/90 simplified gives 13/2
  6. So, 80/15 + 21/18 = 13/2
    In mixed form: 61/2

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