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Add 72/21 and 8/18

1st number: 3 9/21, 2nd number: 8/18

72/21 + 8/18 is 244/63.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 18 is 126
  2. For the 1st fraction, since 21 × 6 = 126,
    72/21 = 72 × 6/21 × 6 = 432/126
  3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
    8/18 = 8 × 7/18 × 7 = 56/126
  4. Add the two fractions:
    432/126 + 56/126 = 432 + 56/126 = 488/126
  5. 488/126 simplified gives 244/63
  6. So, 72/21 + 8/18 = 244/63
    In mixed form: 355/63

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