Answers

Add 30/20 and 42/90

1^st number: 1 10/20, 2^nd number: 42/90

30/20 + 42/90 is 59/30.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 90 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 20 × 9 = 180,
   30/20 = 30 × 9/20 × 9 = 270/180
3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
   42/90 = 42 × 2/90 × 2 = 84/180
4. Add the two like fractions:
   270/180 + 84/180 = 270 + 84/180 = 354/180
5. 354/180 simplified gives 59/30
6. So, 30/20 + 42/90 = 59/30
   In mixed form: 129/30

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