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Add 15/4 and 21/45

1st number: 3 3/4, 2nd number: 21/45

15/4 + 21/45 is 253/60.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 45 is 180
  2. For the 1st fraction, since 4 × 45 = 180,
    15/4 = 15 × 45/4 × 45 = 675/180
  3. Likewise, for the 2nd fraction, since 45 × 4 = 180,
    21/45 = 21 × 4/45 × 4 = 84/180
  4. Add the two fractions:
    675/180 + 84/180 = 675 + 84/180 = 759/180
  5. 759/180 simplified gives 253/60
  6. So, 15/4 + 21/45 = 253/60
    In mixed form: 413/60

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