Answers

Add 63/81 and 15/21

63/81 + 15/21 is 94/63.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 21 is 567
   
   Next, find the equivalent fraction of both fractional numbers with denominator 567
2. For the 1st fraction, since 81 × 7 = 567,
   63/81 = 63 × 7/81 × 7 = 441/567
3. Likewise, for the 2nd fraction, since 21 × 27 = 567,
   15/21 = 15 × 27/21 × 27 = 405/567
4. Add the two like fractions:
   441/567 + 405/567 = 441 + 405/567 = 846/567
5. 846/567 simplified gives 94/63
6. So, 63/81 + 15/21 = 94/63
   In mixed form: 131/63

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