Answers

Subtract 18/98 from 81/80

1^st number: 1 1/80, 2^nd number: 18/98

81/80 - 18/98 is 3249/3920.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 98 is 3920
   
   Next, find the equivalent fraction of both fractional numbers with denominator 3920
2. For the 1st fraction, since 80 × 49 = 3920,
   81/80 = 81 × 49/80 × 49 = 3969/3920
3. Likewise, for the 2nd fraction, since 98 × 40 = 3920,
   18/98 = 18 × 40/98 × 40 = 720/3920
4. Subtract the two like fractions:
   3969/3920 - 720/3920 = 3969 - 720/3920 = 3249/3920

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