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Add 90/20 and 40/81

1st number: 4 10/20, 2nd number: 40/81

90/20 + 40/81 is 809/162.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 81 is 1620

    Next, find the equivalent fraction of both fractional numbers with denominator 1620
  2. For the 1st fraction, since 20 × 81 = 1620,
    90/20 = 90 × 81/20 × 81 = 7290/1620
  3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
    40/81 = 40 × 20/81 × 20 = 800/1620
  4. Add the two like fractions:
    7290/1620 + 800/1620 = 7290 + 800/1620 = 8090/1620
  5. 8090/1620 simplified gives 809/162
  6. So, 90/20 + 40/81 = 809/162
    In mixed form: 4161/162

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