Answers

Add 21/49 and 9/63

21/49 + 9/63 is 4/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 49 and 63 is 441
   
   Next, find the equivalent fraction of both fractional numbers with denominator 441
2. For the 1st fraction, since 49 × 9 = 441,
   21/49 = 21 × 9/49 × 9 = 189/441
3. Likewise, for the 2nd fraction, since 63 × 7 = 441,
   9/63 = 9 × 7/63 × 7 = 63/441
4. Add the two like fractions:
   189/441 + 63/441 = 189 + 63/441 = 252/441
5. 252/441 simplified gives 4/7
6. So, 21/49 + 9/63 = 4/7

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