Answers

Add 90/40 and 15/54

1^st number: 2 10/40, 2^nd number: 15/54

90/40 + 15/54 is 91/36.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 54 is 1080
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1080
2. For the 1st fraction, since 40 × 27 = 1080,
   90/40 = 90 × 27/40 × 27 = 2430/1080
3. Likewise, for the 2nd fraction, since 54 × 20 = 1080,
   15/54 = 15 × 20/54 × 20 = 300/1080
4. Add the two like fractions:
   2430/1080 + 300/1080 = 2430 + 300/1080 = 2730/1080
5. 2730/1080 simplified gives 91/36
6. So, 90/40 + 15/54 = 91/36
   In mixed form: 219/36

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