Answers

Add 81/12 and 54/63

1^st number: 6 9/12, 2^nd number: 54/63

81/12 + 54/63 is 213/28.

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,
   81/12 = 81 × 21/12 × 21 = 1701/252
3. Likewise, for the 2nd fraction, since 63 × 4 = 252,
   54/63 = 54 × 4/63 × 4 = 216/252
4. Add the two like fractions:
   1701/252 + 216/252 = 1701 + 216/252 = 1917/252
5. 1917/252 simplified gives 213/28
6. So, 81/12 + 54/63 = 213/28
   In mixed form: 717/28

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