Answers

Add 15/63 and 2/28

15/63 + 2/28 is 13/42.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 28 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 63 × 4 = 252,
   15/63 = 15 × 4/63 × 4 = 60/252
3. Likewise, for the 2nd fraction, since 28 × 9 = 252,
   2/28 = 2 × 9/28 × 9 = 18/252
4. Add the two like fractions:
   60/252 + 18/252 = 60 + 18/252 = 78/252
5. 78/252 simplified gives 13/42
6. So, 15/63 + 2/28 = 13/42

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