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Add 21/20 and 15/12

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

21/20 + 15/12 is 23/10.

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,
    21/20 = 21 × 3/20 × 3 = 63/60
  3. Likewise, for the 2nd fraction, since 12 × 5 = 60,
    15/12 = 15 × 5/12 × 5 = 75/60
  4. Add the two like fractions:
    63/60 + 75/60 = 63 + 75/60 = 138/60
  5. 138/60 simplified gives 23/10
  6. So, 21/20 + 15/12 = 23/10
    In mixed form: 23/10

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