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Add 10/81 and 72/80

10/81 + 72/80 is 829/810.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 81 and 80 is 6480

    Next, find the equivalent fraction of both fractional numbers with denominator 6480
  2. For the 1st fraction, since 81 × 80 = 6480,
    10/81 = 10 × 80/81 × 80 = 800/6480
  3. Likewise, for the 2nd fraction, since 80 × 81 = 6480,
    72/80 = 72 × 81/80 × 81 = 5832/6480
  4. Add the two like fractions:
    800/6480 + 5832/6480 = 800 + 5832/6480 = 6632/6480
  5. 6632/6480 simplified gives 829/810
  6. So, 10/81 + 72/80 = 829/810
    In mixed form: 119/810

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