Answers

Add 90/18 and 45/20

1^st number: 5 0/18, 2^nd number: 2 5/20

90/18 + 45/20 is 29/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 20 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 18 × 10 = 180,
   90/18 = 90 × 10/18 × 10 = 900/180
3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
   45/20 = 45 × 9/20 × 9 = 405/180
4. Add the two like fractions:
   900/180 + 405/180 = 900 + 405/180 = 1305/180
5. 1305/180 simplified gives 29/4
6. So, 90/18 + 45/20 = 29/4
   In mixed form: 71/4

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