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Add 84/12 and 12/90

1st number: 7 0/12, 2nd number: 12/90

84/12 + 12/90 is 107/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 90 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 12 × 15 = 180,
    84/12 = 84 × 15/12 × 15 = 1260/180
  3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
    12/90 = 12 × 2/90 × 2 = 24/180
  4. Add the two like fractions:
    1260/180 + 24/180 = 1260 + 24/180 = 1284/180
  5. 1284/180 simplified gives 107/15
  6. So, 84/12 + 12/90 = 107/15
    In mixed form: 72/15

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