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Add 15/28 and 21/4

1st number: 15/28, 2nd number: 5 1/4

15/28 + 21/4 is 81/14.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 4 is 28

    Next, find the equivalent fraction of both fractional numbers with denominator 28
  2. For the 1st fraction, since 28 × 1 = 28,
    15/28 = 15 × 1/28 × 1 = 15/28
  3. Likewise, for the 2nd fraction, since 4 × 7 = 28,
    21/4 = 21 × 7/4 × 7 = 147/28
  4. Add the two like fractions:
    15/28 + 147/28 = 15 + 147/28 = 162/28
  5. 162/28 simplified gives 81/14
  6. So, 15/28 + 21/4 = 81/14
    In mixed form: 511/14

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