Answers

Subtract 21/4 from 18/98

1^st number: 18/98, 2^nd number: 5 1/4

18/98 - 21/4 is -993/196.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 98 and 4 is 196
   
   Next, find the equivalent fraction of both fractional numbers with denominator 196
2. For the 1st fraction, since 98 × 2 = 196,
   18/98 = 18 × 2/98 × 2 = 36/196
3. Likewise, for the 2nd fraction, since 4 × 49 = 196,
   21/4 = 21 × 49/4 × 49 = 1029/196
4. Subtract the two like fractions:
   36/196 - 1029/196 = 36 - 1029/196 = -993/196

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