Answers

Add 15/64 and 70/42

1^st number: 15/64, 2^nd number: 1 28/42

15/64 + 70/42 is 365/192.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 64 and 42 is 1344
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1344
2. For the 1st fraction, since 64 × 21 = 1344,
   15/64 = 15 × 21/64 × 21 = 315/1344
3. Likewise, for the 2nd fraction, since 42 × 32 = 1344,
   70/42 = 70 × 32/42 × 32 = 2240/1344
4. Add the two like fractions:
   315/1344 + 2240/1344 = 315 + 2240/1344 = 2555/1344
5. 2555/1344 simplified gives 365/192
6. So, 15/64 + 70/42 = 365/192
   In mixed form: 1173/192

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