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Add 18/90 and 12/20

18/90 + 12/20 is 4/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 20 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 90 × 2 = 180,
    18/90 = 18 × 2/90 × 2 = 36/180
  3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
    12/20 = 12 × 9/20 × 9 = 108/180
  4. Add the two like fractions:
    36/180 + 108/180 = 36 + 108/180 = 144/180
  5. 144/180 simplified gives 4/5
  6. So, 18/90 + 12/20 = 4/5

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