Answers

Add 63/5 and 54/16

1^st number: 12 3/5, 2^nd number: 3 6/16

63/5 + 54/16 is 639/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 16 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 5 × 16 = 80,
   63/5 = 63 × 16/5 × 16 = 1008/80
3. Likewise, for the 2nd fraction, since 16 × 5 = 80,
   54/16 = 54 × 5/16 × 5 = 270/80
4. Add the two like fractions:
   1008/80 + 270/80 = 1008 + 270/80 = 1278/80
5. 1278/80 simplified gives 639/40
6. So, 63/5 + 54/16 = 639/40
   In mixed form: 1539/40

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