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Add 72/20 and 3/9

1st number: 3 12/20, 2nd number: 3/9

72/20 + 3/9 is 59/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 9 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 20 × 9 = 180,
    72/20 = 72 × 9/20 × 9 = 648/180
  3. Likewise, for the 2nd fraction, since 9 × 20 = 180,
    3/9 = 3 × 20/9 × 20 = 60/180
  4. Add the two like fractions:
    648/180 + 60/180 = 648 + 60/180 = 708/180
  5. 708/180 simplified gives 59/15
  6. So, 72/20 + 3/9 = 59/15
    In mixed form: 314/15

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