Answers

Add 84/64 and 40/27

1^st number: 1 20/64, 2^nd number: 1 13/27

84/64 + 40/27 is 1207/432.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 64 and 27 is 1728
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1728
2. For the 1st fraction, since 64 × 27 = 1728,
   84/64 = 84 × 27/64 × 27 = 2268/1728
3. Likewise, for the 2nd fraction, since 27 × 64 = 1728,
   40/27 = 40 × 64/27 × 64 = 2560/1728
4. Add the two like fractions:
   2268/1728 + 2560/1728 = 2268 + 2560/1728 = 4828/1728
5. 4828/1728 simplified gives 1207/432
6. So, 84/64 + 40/27 = 1207/432
   In mixed form: 2343/432

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