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Add 90/7 and 12/80

1st number: 12 6/7, 2nd number: 12/80

90/7 + 12/80 is 1821/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 80 is 560

    Next, find the equivalent fraction of both fractional numbers with denominator 560
  2. For the 1st fraction, since 7 × 80 = 560,
    90/7 = 90 × 80/7 × 80 = 7200/560
  3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
    12/80 = 12 × 7/80 × 7 = 84/560
  4. Add the two like fractions:
    7200/560 + 84/560 = 7200 + 84/560 = 7284/560
  5. 7284/560 simplified gives 1821/140
  6. So, 90/7 + 12/80 = 1821/140
    In mixed form: 131/140

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