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Subtract 42/45 from 5/42

5/42 - 42/45 is -57/70.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 45 is 630
  2. For the 1st fraction, since 42 × 15 = 630,
    5/42 = 5 × 15/42 × 15 = 75/630
  3. Likewise, for the 2nd fraction, since 45 × 14 = 630,
    42/45 = 42 × 14/45 × 14 = 588/630
  4. Subtract the two fractions:
    75/630 - 588/630 = 75 - 588/630 = -513/630
  5. After reducing the fraction, the answer is -57/70

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