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Add 21/8 and 15/54

1st number: 2 5/8, 2nd number: 15/54

21/8 + 15/54 is 209/72.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 54 is 216

    Next, find the equivalent fraction of both fractional numbers with denominator 216
  2. For the 1st fraction, since 8 × 27 = 216,
    21/8 = 21 × 27/8 × 27 = 567/216
  3. Likewise, for the 2nd fraction, since 54 × 4 = 216,
    15/54 = 15 × 4/54 × 4 = 60/216
  4. Add the two like fractions:
    567/216 + 60/216 = 567 + 60/216 = 627/216
  5. 627/216 simplified gives 209/72
  6. So, 21/8 + 15/54 = 209/72
    In mixed form: 265/72

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