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Add 21/15 and 5/54

1st number: 1 6/15, 2nd number: 5/54

21/15 + 5/54 is 403/270.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 54 is 270
  2. For the 1st fraction, since 15 × 18 = 270,
    21/15 = 21 × 18/15 × 18 = 378/270
  3. Likewise, for the 2nd fraction, since 54 × 5 = 270,
    5/54 = 5 × 5/54 × 5 = 25/270
  4. Add the two fractions:
    378/270 + 25/270 = 378 + 25/270 = 403/270
  5. So, 21/15 + 5/54 = 403/270
    In mixed form: 1133/270

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