Answers

Add 90/28 and 21/54

1^st number: 3 6/28, 2^nd number: 21/54

90/28 + 21/54 is 227/63.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 54 is 756
   
   Next, find the equivalent fraction of both fractional numbers with denominator 756
2. For the 1st fraction, since 28 × 27 = 756,
   90/28 = 90 × 27/28 × 27 = 2430/756
3. Likewise, for the 2nd fraction, since 54 × 14 = 756,
   21/54 = 21 × 14/54 × 14 = 294/756
4. Add the two like fractions:
   2430/756 + 294/756 = 2430 + 294/756 = 2724/756
5. 2724/756 simplified gives 227/63
6. So, 90/28 + 21/54 = 227/63
   In mixed form: 338/63

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