Answers

Add 45/12 and 40/63

1^st number: 3 9/12, 2^nd number: 40/63

45/12 + 40/63 is 1105/252.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 63 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 12 × 21 = 252,
   45/12 = 45 × 21/12 × 21 = 945/252
3. Likewise, for the 2nd fraction, since 63 × 4 = 252,
   40/63 = 40 × 4/63 × 4 = 160/252
4. Add the two like fractions:
   945/252 + 160/252 = 945 + 160/252 = 1105/252
5. So, 45/12 + 40/63 = 1105/252
   In mixed form: 497/252

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