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Add 8/20 and 81/90

8/20 + 81/90 is 13/10.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 20 × 9 = 180,
    8/20 = 8 × 9/20 × 9 = 72/180
  3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
    81/90 = 81 × 2/90 × 2 = 162/180
  4. Add the two like fractions:
    72/180 + 162/180 = 72 + 162/180 = 234/180
  5. 234/180 simplified gives 13/10
  6. So, 8/20 + 81/90 = 13/10
    In mixed form: 13/10

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