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Add 90/20 and 28/18

1st number: 4 10/20, 2nd number: 1 10/18

90/20 + 28/18 is 109/18.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 18 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 20 × 9 = 180,
    90/20 = 90 × 9/20 × 9 = 810/180
  3. Likewise, for the 2nd fraction, since 18 × 10 = 180,
    28/18 = 28 × 10/18 × 10 = 280/180
  4. Add the two like fractions:
    810/180 + 280/180 = 810 + 280/180 = 1090/180
  5. 1090/180 simplified gives 109/18
  6. So, 90/20 + 28/18 = 109/18
    In mixed form: 61/18

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