Answers

Subtract 40/42 from 3/75

3/75 - 40/42 is -479/525.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 42 is 1050
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1050
2. For the 1st fraction, since 75 × 14 = 1050,
   3/75 = 3 × 14/75 × 14 = 42/1050
3. Likewise, for the 2nd fraction, since 42 × 25 = 1050,
   40/42 = 40 × 25/42 × 25 = 1000/1050
4. Subtract the two like fractions:
   42/1050 - 1000/1050 = 42 - 1000/1050 = -958/1050
5. After reducing the fraction, the answer is -479/525

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