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Add 70/18 and 45/80

1st number: 3 16/18, 2nd number: 45/80

70/18 + 45/80 is 641/144.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 80 is 720
  2. For the 1st fraction, since 18 × 40 = 720,
    70/18 = 70 × 40/18 × 40 = 2800/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    45/80 = 45 × 9/80 × 9 = 405/720
  4. Add the two fractions:
    2800/720 + 405/720 = 2800 + 405/720 = 3205/720
  5. 3205/720 simplified gives 641/144
  6. So, 70/18 + 45/80 = 641/144
    In mixed form: 465/144

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