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Add 80/7 and 12/40

1st number: 11 3/7, 2nd number: 12/40

80/7 + 12/40 is 821/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 40 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 7 × 40 = 280,
    80/7 = 80 × 40/7 × 40 = 3200/280
  3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
    12/40 = 12 × 7/40 × 7 = 84/280
  4. Add the two like fractions:
    3200/280 + 84/280 = 3200 + 84/280 = 3284/280
  5. 3284/280 simplified gives 821/70
  6. So, 80/7 + 12/40 = 821/70
    In mixed form: 1151/70

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