Answers

Add 81/63 and 54/36

1^st number: 1 18/63, 2^nd number: 1 18/36

81/63 + 54/36 is 39/14.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 36 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 63 × 4 = 252,
   81/63 = 81 × 4/63 × 4 = 324/252
3. Likewise, for the 2nd fraction, since 36 × 7 = 252,
   54/36 = 54 × 7/36 × 7 = 378/252
4. Add the two like fractions:
   324/252 + 378/252 = 324 + 378/252 = 702/252
5. 702/252 simplified gives 39/14
6. So, 81/63 + 54/36 = 39/14
   In mixed form: 211/14

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