Answers

Add 63/12 and 45/15

1^st number: 5 3/12, 2^nd number: 3 0/15

63/12 + 45/15 is 33/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 15 is 60
   
   Next, find the equivalent fraction of both fractional numbers with denominator 60
2. For the 1st fraction, since 12 × 5 = 60,
   63/12 = 63 × 5/12 × 5 = 315/60
3. Likewise, for the 2nd fraction, since 15 × 4 = 60,
   45/15 = 45 × 4/15 × 4 = 180/60
4. Add the two like fractions:
   315/60 + 180/60 = 315 + 180/60 = 495/60
5. 495/60 simplified gives 33/4
6. So, 63/12 + 45/15 = 33/4
   In mixed form: 81/4

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