Answers

Add 54/15 and 70/64

1^st number: 3 9/15, 2^nd number: 1 6/64

54/15 + 70/64 is 751/160.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 64 is 960
   
   Next, find the equivalent fraction of both fractional numbers with denominator 960
2. For the 1st fraction, since 15 × 64 = 960,
   54/15 = 54 × 64/15 × 64 = 3456/960
3. Likewise, for the 2nd fraction, since 64 × 15 = 960,
   70/64 = 70 × 15/64 × 15 = 1050/960
4. Add the two like fractions:
   3456/960 + 1050/960 = 3456 + 1050/960 = 4506/960
5. 4506/960 simplified gives 751/160
6. So, 54/15 + 70/64 = 751/160
   In mixed form: 4111/160

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