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Add 21/90 and 27/4

1st number: 21/90, 2nd number: 6 3/4

21/90 + 27/4 is 419/60.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 4 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 90 × 2 = 180,
    21/90 = 21 × 2/90 × 2 = 42/180
  3. Likewise, for the 2nd fraction, since 4 × 45 = 180,
    27/4 = 27 × 45/4 × 45 = 1215/180
  4. Add the two like fractions:
    42/180 + 1215/180 = 42 + 1215/180 = 1257/180
  5. 1257/180 simplified gives 419/60
  6. So, 21/90 + 27/4 = 419/60
    In mixed form: 659/60

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