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Add 72/21 and 18/6

1st number: 3 9/21, 2nd number: 3 0/6

72/21 + 18/6 is 45/7.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 6 is 42

    Next, find the equivalent fraction of both fractional numbers with denominator 42
  2. For the 1st fraction, since 21 × 2 = 42,
    72/21 = 72 × 2/21 × 2 = 144/42
  3. Likewise, for the 2nd fraction, since 6 × 7 = 42,
    18/6 = 18 × 7/6 × 7 = 126/42
  4. Add the two like fractions:
    144/42 + 126/42 = 144 + 126/42 = 270/42
  5. 270/42 simplified gives 45/7
  6. So, 72/21 + 18/6 = 45/7
    In mixed form: 63/7

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