Answers

Add 72/63 and 45/12

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

72/63 + 45/12 is 137/28.

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,
   72/63 = 72 × 4/63 × 4 = 288/252
3. Likewise, for the 2nd fraction, since 12 × 21 = 252,
   45/12 = 45 × 21/12 × 21 = 945/252
4. Add the two like fractions:
   288/252 + 945/252 = 288 + 945/252 = 1233/252
5. 1233/252 simplified gives 137/28
6. So, 72/63 + 45/12 = 137/28
   In mixed form: 425/28

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