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Add 18/20 and 28/45

18/20 + 28/45 is 137/90.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 45 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 20 × 9 = 180,
    18/20 = 18 × 9/20 × 9 = 162/180
  3. Likewise, for the 2nd fraction, since 45 × 4 = 180,
    28/45 = 28 × 4/45 × 4 = 112/180
  4. Add the two like fractions:
    162/180 + 112/180 = 162 + 112/180 = 274/180
  5. 274/180 simplified gives 137/90
  6. So, 18/20 + 28/45 = 137/90
    In mixed form: 147/90

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