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Add 54/15 and 54/90

1st number: 3 9/15, 2nd number: 54/90

54/15 + 54/90 is 21/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 90 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 15 × 6 = 90,
    54/15 = 54 × 6/15 × 6 = 324/90
  3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
    54/90 = 54 × 1/90 × 1 = 54/90
  4. Add the two like fractions:
    324/90 + 54/90 = 324 + 54/90 = 378/90
  5. 378/90 simplified gives 21/5
  6. So, 54/15 + 54/90 = 21/5
    In mixed form: 41/5

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