Answers

Subtract 90/98 from 9/20

9/20 - 90/98 is -459/980.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 98 is 980
   
   Next, find the equivalent fraction of both fractional numbers with denominator 980
2. For the 1st fraction, since 20 × 49 = 980,
   9/20 = 9 × 49/20 × 49 = 441/980
3. Likewise, for the 2nd fraction, since 98 × 10 = 980,
   90/98 = 90 × 10/98 × 10 = 900/980
4. Subtract the two like fractions:
   441/980 - 900/980 = 441 - 900/980 = -459/980

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