Answers

Add 90/63 and 45/28

1^st number: 1 27/63, 2^nd number: 1 17/28

90/63 + 45/28 is 85/28.

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,
   90/63 = 90 × 4/63 × 4 = 360/252
3. Likewise, for the 2nd fraction, since 28 × 9 = 252,
   45/28 = 45 × 9/28 × 9 = 405/252
4. Add the two like fractions:
   360/252 + 405/252 = 360 + 405/252 = 765/252
5. 765/252 simplified gives 85/28
6. So, 90/63 + 45/28 = 85/28
   In mixed form: 31/28

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