Answers

Subtract 25/18 from 42/49

1^st number: 42/49, 2^nd number: 1 7/18

42/49 - 25/18 is -67/126.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 49 and 18 is 882
   
   Next, find the equivalent fraction of both fractional numbers with denominator 882
2. For the 1st fraction, since 49 × 18 = 882,
   42/49 = 42 × 18/49 × 18 = 756/882
3. Likewise, for the 2nd fraction, since 18 × 49 = 882,
   25/18 = 25 × 49/18 × 49 = 1225/882
4. Subtract the two like fractions:
   756/882 - 1225/882 = 756 - 1225/882 = -469/882
5. After reducing the fraction, the answer is -67/126

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