Answers

Add 90/18 and 45/3

1^st number: 5 0/18, 2^nd number: 15 0/3

90/18 + 45/3 is 20/1.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 3 is 18
   
   Next, find the equivalent fraction of both fractional numbers with denominator 18
2. For the 1st fraction, since 18 × 1 = 18,
   90/18 = 90 × 1/18 × 1 = 90/18
3. Likewise, for the 2nd fraction, since 3 × 6 = 18,
   45/3 = 45 × 6/3 × 6 = 270/18
4. Add the two like fractions:
   90/18 + 270/18 = 90 + 270/18 = 360/18
5. 360/18 simplified gives 20/1
6. So, 90/18 + 45/3 = 20/1

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