Answers

Add 20/63 and 21/98

20/63 + 21/98 is 67/126.

Steps for adding 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,
   20/63 = 20 × 14/63 × 14 = 280/882
3. Likewise, for the 2nd fraction, since 98 × 9 = 882,
   21/98 = 21 × 9/98 × 9 = 189/882
4. Add the two like fractions:
   280/882 + 189/882 = 280 + 189/882 = 469/882
5. 469/882 simplified gives 67/126
6. So, 20/63 + 21/98 = 67/126

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