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Add 21/12 and 30/40

1st number: 1 9/12, 2nd number: 30/40

21/12 + 30/40 is 5/2.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 40 is 120
  2. For the 1st fraction, since 12 × 10 = 120,
    21/12 = 21 × 10/12 × 10 = 210/120
  3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
    30/40 = 30 × 3/40 × 3 = 90/120
  4. Add the two fractions:
    210/120 + 90/120 = 210 + 90/120 = 300/120
  5. 300/120 simplified gives 5/2
  6. So, 21/12 + 30/40 = 5/2
    In mixed form: 21/2

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