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Add 72/81 and 16/20

72/81 + 16/20 is 76/45.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 1620
  2. For the 1st fraction, since 81 × 20 = 1620,
    72/81 = 72 × 20/81 × 20 = 1440/1620
  3. Likewise, for the 2nd fraction, since 20 × 81 = 1620,
    16/20 = 16 × 81/20 × 81 = 1296/1620
  4. Add the two like fractions:
    1440/1620 + 1296/1620 = 1440 + 1296/1620 = 2736/1620
  5. 2736/1620 simplified gives 76/45
  6. So, 72/81 + 16/20 = 76/45
    In mixed form: 131/45

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