Answers

Add 18/90 and 42/20

1^st number: 18/90, 2^nd number: 2 2/20

18/90 + 42/20 is 23/10.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 20 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 90 × 2 = 180,
   18/90 = 18 × 2/90 × 2 = 36/180
3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
   42/20 = 42 × 9/20 × 9 = 378/180
4. Add the two like fractions:
   36/180 + 378/180 = 36 + 378/180 = 414/180
5. 414/180 simplified gives 23/10
6. So, 18/90 + 42/20 = 23/10
   In mixed form: 23/10

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