Answers

Subtract 20/21 from 54/98

54/98 - 20/21 is -59/147.

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,
   54/98 = 54 × 3/98 × 3 = 162/294
3. Likewise, for the 2nd fraction, since 21 × 14 = 294,
   20/21 = 20 × 14/21 × 14 = 280/294
4. Subtract the two like fractions:
   162/294 - 280/294 = 162 - 280/294 = -118/294
5. After reducing the fraction, the answer is -59/147

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