Answers

Add 8/21 and 45/63

8/21 + 45/63 is 23/21.

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,
   8/21 = 8 × 3/21 × 3 = 24/63
3. Likewise, for the 2nd fraction, since 63 × 1 = 63,
   45/63 = 45 × 1/63 × 1 = 45/63
4. Add the two like fractions:
   24/63 + 45/63 = 24 + 45/63 = 69/63
5. 69/63 simplified gives 23/21
6. So, 8/21 + 45/63 = 23/21
   In mixed form: 12/21

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