Answers

Add 18/81 and 4/63

18/81 + 4/63 is 2/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 63 is 567
   
   Next, find the equivalent fraction of both fractional numbers with denominator 567
2. For the 1st fraction, since 81 × 7 = 567,
   18/81 = 18 × 7/81 × 7 = 126/567
3. Likewise, for the 2nd fraction, since 63 × 9 = 567,
   4/63 = 4 × 9/63 × 9 = 36/567
4. Add the two like fractions:
   126/567 + 36/567 = 126 + 36/567 = 162/567
5. 162/567 simplified gives 2/7
6. So, 18/81 + 4/63 = 2/7

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