Answers

Add 45/63 and 40/12

1^st number: 45/63, 2^nd number: 3 4/12

45/63 + 40/12 is 85/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 12 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 63 × 4 = 252,
   45/63 = 45 × 4/63 × 4 = 180/252
3. Likewise, for the 2nd fraction, since 12 × 21 = 252,
   40/12 = 40 × 21/12 × 21 = 840/252
4. Add the two like fractions:
   180/252 + 840/252 = 180 + 840/252 = 1020/252
5. 1020/252 simplified gives 85/21
6. So, 45/63 + 40/12 = 85/21
   In mixed form: 41/21

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