Answers

Subtract 81/15 from 25/98

1^st number: 25/98, 2^nd number: 5 6/15

25/98 - 81/15 is -2521/490.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 98 and 15 is 1470
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1470
2. For the 1st fraction, since 98 × 15 = 1470,
   25/98 = 25 × 15/98 × 15 = 375/1470
3. Likewise, for the 2nd fraction, since 15 × 98 = 1470,
   81/15 = 81 × 98/15 × 98 = 7938/1470
4. Subtract the two like fractions:
   375/1470 - 7938/1470 = 375 - 7938/1470 = -7563/1470
5. After reducing the fraction, the answer is -2521/490

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