Answers

Add 3/21 and 21/63

3/21 + 21/63 is 10/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 63 is 63
   
   Next, find the equivalent fraction of both fractional numbers with denominator 63
2. For the 1st fraction, since 21 × 3 = 63,
   3/21 = 3 × 3/21 × 3 = 9/63
3. Likewise, for the 2nd fraction, since 63 × 1 = 63,
   21/63 = 21 × 1/63 × 1 = 21/63
4. Add the two like fractions:
   9/63 + 21/63 = 9 + 21/63 = 30/63
5. 30/63 simplified gives 10/21
6. So, 3/21 + 21/63 = 10/21

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