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Add 72/45 and 21/12

1st number: 1 27/45, 2nd number: 1 9/12

72/45 + 21/12 is 67/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 12 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 45 × 4 = 180,
    72/45 = 72 × 4/45 × 4 = 288/180
  3. Likewise, for the 2nd fraction, since 12 × 15 = 180,
    21/12 = 21 × 15/12 × 15 = 315/180
  4. Add the two like fractions:
    288/180 + 315/180 = 288 + 315/180 = 603/180
  5. 603/180 simplified gives 67/20
  6. So, 72/45 + 21/12 = 67/20
    In mixed form: 37/20

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