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Add 15/4 and 18/90

1st number: 3 3/4, 2nd number: 18/90

15/4 + 18/90 is 79/20.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 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 90 × 2 = 180,
    18/90 = 18 × 2/90 × 2 = 36/180
  4. Add the two like fractions:
    675/180 + 36/180 = 675 + 36/180 = 711/180
  5. 711/180 simplified gives 79/20
  6. So, 15/4 + 18/90 = 79/20
    In mixed form: 319/20

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