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Subtract 45/42 from 12/35

1st number: 12/35, 2nd number: 1 3/42

12/35 - 45/42 is -51/70.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 35 and 42 is 210
  2. For the 1st fraction, since 35 × 6 = 210,
    12/35 = 12 × 6/35 × 6 = 72/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    45/42 = 45 × 5/42 × 5 = 225/210
  4. Subtract the two fractions:
    72/210 - 225/210 = 72 - 225/210 = -153/210
  5. After reducing the fraction, the answer is -51/70

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