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Add 18/20 and 21/12

1st number: 18/20, 2nd number: 1 9/12

18/20 + 21/12 is 53/20.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 20 × 3 = 60,
    18/20 = 18 × 3/20 × 3 = 54/60
  3. Likewise, for the 2nd fraction, since 12 × 5 = 60,
    21/12 = 21 × 5/12 × 5 = 105/60
  4. Add the two like fractions:
    54/60 + 105/60 = 54 + 105/60 = 159/60
  5. 159/60 simplified gives 53/20
  6. So, 18/20 + 21/12 = 53/20
    In mixed form: 213/20

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