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Add 45/15 and 21/28

1st number: 3 0/15, 2nd number: 21/28

45/15 + 21/28 is 15/4.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 28 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 15 × 28 = 420,
    45/15 = 45 × 28/15 × 28 = 1260/420
  3. Likewise, for the 2nd fraction, since 28 × 15 = 420,
    21/28 = 21 × 15/28 × 15 = 315/420
  4. Add the two like fractions:
    1260/420 + 315/420 = 1260 + 315/420 = 1575/420
  5. 1575/420 simplified gives 15/4
  6. So, 45/15 + 21/28 = 15/4
    In mixed form: 33/4

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