Answers

Subtract 9/98 from 81/20

1^st number: 4 1/20, 2^nd number: 9/98

81/20 - 9/98 is 3879/980.

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,
   81/20 = 81 × 49/20 × 49 = 3969/980
3. Likewise, for the 2nd fraction, since 98 × 10 = 980,
   9/98 = 9 × 10/98 × 10 = 90/980
4. Subtract the two like fractions:
   3969/980 - 90/980 = 3969 - 90/980 = 3879/980
5. In mixed form: 3939/980

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