Answers

Subtract 63/20 from 21/98

1^st number: 21/98, 2^nd number: 3 3/20

21/98 - 63/20 is -411/140.

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,
   21/98 = 21 × 10/98 × 10 = 210/980
3. Likewise, for the 2nd fraction, since 20 × 49 = 980,
   63/20 = 63 × 49/20 × 49 = 3087/980
4. Subtract the two like fractions:
   210/980 - 3087/980 = 210 - 3087/980 = -2877/980
5. After reducing the fraction, the answer is -411/140

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