Answers

Subtract 18/98 from 21/63

21/63 - 18/98 is 22/147.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 98 is 882
   
   Next, find the equivalent fraction of both fractional numbers with denominator 882
2. For the 1st fraction, since 63 × 14 = 882,
   21/63 = 21 × 14/63 × 14 = 294/882
3. Likewise, for the 2nd fraction, since 98 × 9 = 882,
   18/98 = 18 × 9/98 × 9 = 162/882
4. Subtract the two like fractions:
   294/882 - 162/882 = 294 - 162/882 = 132/882
5. After reducing the fraction, the answer is 22/147

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