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Add 81/72 and 3/20

1st number: 1 9/72, 2nd number: 3/20

81/72 + 3/20 is 51/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 20 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 72 × 5 = 360,
    81/72 = 81 × 5/72 × 5 = 405/360
  3. Likewise, for the 2nd fraction, since 20 × 18 = 360,
    3/20 = 3 × 18/20 × 18 = 54/360
  4. Add the two like fractions:
    405/360 + 54/360 = 405 + 54/360 = 459/360
  5. 459/360 simplified gives 51/40
  6. So, 81/72 + 3/20 = 51/40
    In mixed form: 111/40

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