Answers

Subtract 21/18 from 15/98

1^st number: 15/98, 2^nd number: 1 3/18

15/98 - 21/18 is -149/147.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 98 and 18 is 882
   
   Next, find the equivalent fraction of both fractional numbers with denominator 882
2. For the 1st fraction, since 98 × 9 = 882,
   15/98 = 15 × 9/98 × 9 = 135/882
3. Likewise, for the 2nd fraction, since 18 × 49 = 882,
   21/18 = 21 × 49/18 × 49 = 1029/882
4. Subtract the two like fractions:
   135/882 - 1029/882 = 135 - 1029/882 = -894/882
5. After reducing the fraction, the answer is -149/147

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