Answers

Add 90/27 and 18/64

1^st number: 3 9/27, 2^nd number: 18/64

90/27 + 18/64 is 347/96.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 27 and 64 is 1728
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1728
2. For the 1st fraction, since 27 × 64 = 1728,
   90/27 = 90 × 64/27 × 64 = 5760/1728
3. Likewise, for the 2nd fraction, since 64 × 27 = 1728,
   18/64 = 18 × 27/64 × 27 = 486/1728
4. Add the two like fractions:
   5760/1728 + 486/1728 = 5760 + 486/1728 = 6246/1728
5. 6246/1728 simplified gives 347/96
6. So, 90/27 + 18/64 = 347/96
   In mixed form: 359/96

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