Answers

Add 90/27 and 90/28

1^st number: 3 9/27, 2^nd number: 3 6/28

90/27 + 90/28 is 275/42.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 27 and 28 is 756
   
   Next, find the equivalent fraction of both fractional numbers with denominator 756
2. For the 1st fraction, since 27 × 28 = 756,
   90/27 = 90 × 28/27 × 28 = 2520/756
3. Likewise, for the 2nd fraction, since 28 × 27 = 756,
   90/28 = 90 × 27/28 × 27 = 2430/756
4. Add the two like fractions:
   2520/756 + 2430/756 = 2520 + 2430/756 = 4950/756
5. 4950/756 simplified gives 275/42
6. So, 90/27 + 90/28 = 275/42
   In mixed form: 623/42

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