Answers

Subtract 40/98 from 7/20

7/20 - 40/98 is -57/980.

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,
   7/20 = 7 × 49/20 × 49 = 343/980
3. Likewise, for the 2nd fraction, since 98 × 10 = 980,
   40/98 = 40 × 10/98 × 10 = 400/980
4. Subtract the two like fractions:
   343/980 - 400/980 = 343 - 400/980 = -57/980

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