Answers

Subtract 25/49 from 1/42

1/42 - 25/49 is -143/294.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 49 is 294
   
   Next, find the equivalent fraction of both fractional numbers with denominator 294
2. For the 1st fraction, since 42 × 7 = 294,
   1/42 = 1 × 7/42 × 7 = 7/294
3. Likewise, for the 2nd fraction, since 49 × 6 = 294,
   25/49 = 25 × 6/49 × 6 = 150/294
4. Subtract the two like fractions:
   7/294 - 150/294 = 7 - 150/294 = -143/294

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