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Add 42/12 and 21/20

1st number: 3 6/12, 2nd number: 1 1/20

42/12 + 21/20 is 91/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 20 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 12 × 5 = 60,
    42/12 = 42 × 5/12 × 5 = 210/60
  3. Likewise, for the 2nd fraction, since 20 × 3 = 60,
    21/20 = 21 × 3/20 × 3 = 63/60
  4. Add the two like fractions:
    210/60 + 63/60 = 210 + 63/60 = 273/60
  5. 273/60 simplified gives 91/20
  6. So, 42/12 + 21/20 = 91/20
    In mixed form: 411/20

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