Answers

Add 21/64 and 7/81

21/64 + 7/81 is 2149/5184.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 64 and 81 is 5184
   
   Next, find the equivalent fraction of both fractional numbers with denominator 5184
2. For the 1st fraction, since 64 × 81 = 5184,
   21/64 = 21 × 81/64 × 81 = 1701/5184
3. Likewise, for the 2nd fraction, since 81 × 64 = 5184,
   7/81 = 7 × 64/81 × 64 = 448/5184
4. Add the two like fractions:
   1701/5184 + 448/5184 = 1701 + 448/5184 = 2149/5184
5. So, 21/64 + 7/81 = 2149/5184

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