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Add 21/10 and 5/4

1st number: 2 1/10, 2nd number: 1 1/4

21/10 + 5/4 is 67/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 4 is 20

    Next, find the equivalent fraction of both fractional numbers with denominator 20
  2. For the 1st fraction, since 10 × 2 = 20,
    21/10 = 21 × 2/10 × 2 = 42/20
  3. Likewise, for the 2nd fraction, since 4 × 5 = 20,
    5/4 = 5 × 5/4 × 5 = 25/20
  4. Add the two like fractions:
    42/20 + 25/20 = 42 + 25/20 = 67/20
  5. So, 21/10 + 5/4 = 67/20
    In mixed form: 37/20

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