Answers

Subtract 21/75 from 6/42

6/42 - 21/75 is -24/175.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 75 is 1050
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1050
2. For the 1st fraction, since 42 × 25 = 1050,
   6/42 = 6 × 25/42 × 25 = 150/1050
3. Likewise, for the 2nd fraction, since 75 × 14 = 1050,
   21/75 = 21 × 14/75 × 14 = 294/1050
4. Subtract the two like fractions:
   150/1050 - 294/1050 = 150 - 294/1050 = -144/1050
5. After reducing the fraction, the answer is -24/175

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