Answers

Subtract 90/72 from 3/98

1^st number: 3/98, 2^nd number: 1 18/72

3/98 - 90/72 is -239/196.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 98 and 72 is 3528
   
   Next, find the equivalent fraction of both fractional numbers with denominator 3528
2. For the 1st fraction, since 98 × 36 = 3528,
   3/98 = 3 × 36/98 × 36 = 108/3528
3. Likewise, for the 2nd fraction, since 72 × 49 = 3528,
   90/72 = 90 × 49/72 × 49 = 4410/3528
4. Subtract the two like fractions:
   108/3528 - 4410/3528 = 108 - 4410/3528 = -4302/3528
5. After reducing the fraction, the answer is -239/196

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