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Add 9/42 and 6/40

9/42 + 6/40 is 51/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 40 is 840
  2. For the 1st fraction, since 42 × 20 = 840,
    9/42 = 9 × 20/42 × 20 = 180/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    6/40 = 6 × 21/40 × 21 = 126/840
  4. Add the two fractions:
    180/840 + 126/840 = 180 + 126/840 = 306/840
  5. After reducing the fraction, the answer is 51/140

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