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Add 72/18 and 45/20

1st number: 4 0/18, 2nd number: 2 5/20

72/18 + 45/20 is 25/4.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 20 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 18 × 10 = 180,
    72/18 = 72 × 10/18 × 10 = 720/180
  3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
    45/20 = 45 × 9/20 × 9 = 405/180
  4. Add the two like fractions:
    720/180 + 405/180 = 720 + 405/180 = 1125/180
  5. 1125/180 simplified gives 25/4
  6. So, 72/18 + 45/20 = 25/4
    In mixed form: 61/4

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