Answers

Add 72/18 and 90/5

1^st number: 4 0/18, 2^nd number: 18 0/5

72/18 + 90/5 is 22/1.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 5 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 18 × 5 = 90,
   72/18 = 72 × 5/18 × 5 = 360/90
3. Likewise, for the 2nd fraction, since 5 × 18 = 90,
   90/5 = 90 × 18/5 × 18 = 1620/90
4. Add the two like fractions:
   360/90 + 1620/90 = 360 + 1620/90 = 1980/90
5. 1980/90 simplified gives 22/1
6. So, 72/18 + 90/5 = 22/1

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