Answers

Add 90/28 and 16/63

1^st number: 3 6/28, 2^nd number: 16/63

90/28 + 16/63 is 437/126.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 63 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 28 × 9 = 252,
   90/28 = 90 × 9/28 × 9 = 810/252
3. Likewise, for the 2nd fraction, since 63 × 4 = 252,
   16/63 = 16 × 4/63 × 4 = 64/252
4. Add the two like fractions:
   810/252 + 64/252 = 810 + 64/252 = 874/252
5. 874/252 simplified gives 437/126
6. So, 90/28 + 16/63 = 437/126
   In mixed form: 359/126

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