Answers

Add 20/4 and 90/5

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

20/4 + 90/5 is 23/1.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 5 is 20
   
   Next, find the equivalent fraction of both fractional numbers with denominator 20
2. For the 1st fraction, since 4 × 5 = 20,
   20/4 = 20 × 5/4 × 5 = 100/20
3. Likewise, for the 2nd fraction, since 5 × 4 = 20,
   90/5 = 90 × 4/5 × 4 = 360/20
4. Add the two like fractions:
   100/20 + 360/20 = 100 + 360/20 = 460/20
5. 460/20 simplified gives 23/1
6. So, 20/4 + 90/5 = 23/1

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