Answers

Subtract 7/81 from 4/98

4/98 - 7/81 is -181/3969.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 98 and 81 is 7938
   
   Next, find the equivalent fraction of both fractional numbers with denominator 7938
2. For the 1st fraction, since 98 × 81 = 7938,
   4/98 = 4 × 81/98 × 81 = 324/7938
3. Likewise, for the 2nd fraction, since 81 × 98 = 7938,
   7/81 = 7 × 98/81 × 98 = 686/7938
4. Subtract the two like fractions:
   324/7938 - 686/7938 = 324 - 686/7938 = -362/7938
5. After reducing the fraction, the answer is -181/3969

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