Answers

Add 81/63 and 21/35

1^st number: 1 18/63, 2^nd number: 21/35

81/63 + 21/35 is 66/35.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 35 is 315
   
   Next, find the equivalent fraction of both fractional numbers with denominator 315
2. For the 1st fraction, since 63 × 5 = 315,
   81/63 = 81 × 5/63 × 5 = 405/315
3. Likewise, for the 2nd fraction, since 35 × 9 = 315,
   21/35 = 21 × 9/35 × 9 = 189/315
4. Add the two like fractions:
   405/315 + 189/315 = 405 + 189/315 = 594/315
5. 594/315 simplified gives 66/35
6. So, 81/63 + 21/35 = 66/35
   In mixed form: 131/35

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