Answers

Subtract 18/21 from 5/98

5/98 - 18/21 is -79/98.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 98 and 21 is 294
   
   Next, find the equivalent fraction of both fractional numbers with denominator 294
2. For the 1st fraction, since 98 × 3 = 294,
   5/98 = 5 × 3/98 × 3 = 15/294
3. Likewise, for the 2nd fraction, since 21 × 14 = 294,
   18/21 = 18 × 14/21 × 14 = 252/294
4. Subtract the two like fractions:
   15/294 - 252/294 = 15 - 252/294 = -237/294
5. After reducing the fraction, the answer is -79/98

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