Answers

Add 15/90 and 63/28

1^st number: 15/90, 2^nd number: 2 7/28

15/90 + 63/28 is 29/12.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 28 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 90 × 14 = 1260,
   15/90 = 15 × 14/90 × 14 = 210/1260
3. Likewise, for the 2nd fraction, since 28 × 45 = 1260,
   63/28 = 63 × 45/28 × 45 = 2835/1260
4. Add the two like fractions:
   210/1260 + 2835/1260 = 210 + 2835/1260 = 3045/1260
5. 3045/1260 simplified gives 29/12
6. So, 15/90 + 63/28 = 29/12
   In mixed form: 25/12

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