Answers

Add 70/63 and 45/12

1^st number: 1 7/63, 2^nd number: 3 9/12

70/63 + 45/12 is 175/36.

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,
   70/63 = 70 × 4/63 × 4 = 280/252
3. Likewise, for the 2nd fraction, since 12 × 21 = 252,
   45/12 = 45 × 21/12 × 21 = 945/252
4. Add the two like fractions:
   280/252 + 945/252 = 280 + 945/252 = 1225/252
5. 1225/252 simplified gives 175/36
6. So, 70/63 + 45/12 = 175/36
   In mixed form: 431/36

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