Answers

Subtract 25/42 from 7/18

7/18 - 25/42 is -13/63.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 42 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 18 × 7 = 126,
   7/18 = 7 × 7/18 × 7 = 49/126
3. Likewise, for the 2nd fraction, since 42 × 3 = 126,
   25/42 = 25 × 3/42 × 3 = 75/126
4. Subtract the two like fractions:
   49/126 - 75/126 = 49 - 75/126 = -26/126
5. After reducing the fraction, the answer is -13/63

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