Answers

Add 15/63 and 84/18

1^st number: 15/63, 2^nd number: 4 12/18

15/63 + 84/18 is 103/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 18 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 63 × 2 = 126,
   15/63 = 15 × 2/63 × 2 = 30/126
3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
   84/18 = 84 × 7/18 × 7 = 588/126
4. Add the two like fractions:
   30/126 + 588/126 = 30 + 588/126 = 618/126
5. 618/126 simplified gives 103/21
6. So, 15/63 + 84/18 = 103/21
   In mixed form: 419/21

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