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Add 30/18 and 90/72

1st number: 1 12/18, 2nd number: 1 18/72

30/18 + 90/72 is 35/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 72 is 72
  2. For the 1st fraction, since 18 × 4 = 72,
    30/18 = 30 × 4/18 × 4 = 120/72
  3. Likewise, for the 2nd fraction, since 72 × 1 = 72,
    90/72 = 90 × 1/72 × 1 = 90/72
  4. Add the two fractions:
    120/72 + 90/72 = 120 + 90/72 = 210/72
  5. 210/72 simplified gives 35/12
  6. So, 30/18 + 90/72 = 35/12
    In mixed form: 211/12

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