Answers

Add 90/54 and 8/15

1^st number: 1 36/54, 2^nd number: 8/15

90/54 + 8/15 is 11/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 15 is 270
   
   Next, find the equivalent fraction of both fractional numbers with denominator 270
2. For the 1st fraction, since 54 × 5 = 270,
   90/54 = 90 × 5/54 × 5 = 450/270
3. Likewise, for the 2nd fraction, since 15 × 18 = 270,
   8/15 = 8 × 18/15 × 18 = 144/270
4. Add the two like fractions:
   450/270 + 144/270 = 450 + 144/270 = 594/270
5. 594/270 simplified gives 11/5
6. So, 90/54 + 8/15 = 11/5
   In mixed form: 21/5

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