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Subtract 40/42 from 3/25

3/25 - 40/42 is -437/525.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 25 and 42 is 1050
  2. For the 1st fraction, since 25 × 42 = 1050,
    3/25 = 3 × 42/25 × 42 = 126/1050
  3. Likewise, for the 2nd fraction, since 42 × 25 = 1050,
    40/42 = 40 × 25/42 × 25 = 1000/1050
  4. Subtract the two fractions:
    126/1050 - 1000/1050 = 126 - 1000/1050 = -874/1050
  5. After reducing the fraction, the answer is -437/525

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