Answers

Subtract 81/98 from 4/21

4/21 - 81/98 is -187/294.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 98 is 294
   
   Next, find the equivalent fraction of both fractional numbers with denominator 294
2. For the 1st fraction, since 21 × 14 = 294,
   4/21 = 4 × 14/21 × 14 = 56/294
3. Likewise, for the 2nd fraction, since 98 × 3 = 294,
   81/98 = 81 × 3/98 × 3 = 243/294
4. Subtract the two like fractions:
   56/294 - 243/294 = 56 - 243/294 = -187/294

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