Answers

Subtract 81/20 from 12/98

1^st number: 12/98, 2^nd number: 4 1/20

12/98 - 81/20 is -3849/980.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 98 and 20 is 980
   
   Next, find the equivalent fraction of both fractional numbers with denominator 980
2. For the 1st fraction, since 98 × 10 = 980,
   12/98 = 12 × 10/98 × 10 = 120/980
3. Likewise, for the 2nd fraction, since 20 × 49 = 980,
   81/20 = 81 × 49/20 × 49 = 3969/980
4. Subtract the two like fractions:
   120/980 - 3969/980 = 120 - 3969/980 = -3849/980

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