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Add 21/12 and 28/10

1st number: 1 9/12, 2nd number: 2 8/10

21/12 + 28/10 is 91/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 10 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 12 × 5 = 60,
    21/12 = 21 × 5/12 × 5 = 105/60
  3. Likewise, for the 2nd fraction, since 10 × 6 = 60,
    28/10 = 28 × 6/10 × 6 = 168/60
  4. Add the two like fractions:
    105/60 + 168/60 = 105 + 168/60 = 273/60
  5. 273/60 simplified gives 91/20
  6. So, 21/12 + 28/10 = 91/20
    In mixed form: 411/20

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