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Add 21/4 and 12/8

1st number: 5 1/4, 2nd number: 1 4/8

21/4 + 12/8 is 27/4.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 8 is 8

    Next, find the equivalent fraction of both fractional numbers with denominator 8
  2. For the 1st fraction, since 4 × 2 = 8,
    21/4 = 21 × 2/4 × 2 = 42/8
  3. Likewise, for the 2nd fraction, since 8 × 1 = 8,
    12/8 = 12 × 1/8 × 1 = 12/8
  4. Add the two like fractions:
    42/8 + 12/8 = 42 + 12/8 = 54/8
  5. 54/8 simplified gives 27/4
  6. So, 21/4 + 12/8 = 27/4
    In mixed form: 63/4

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