Answers

Add 81/18 and 42/90

1^st number: 4 9/18, 2^nd number: 42/90

81/18 + 42/90 is 149/30.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 90 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 18 × 5 = 90,
   81/18 = 81 × 5/18 × 5 = 405/90
3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
   42/90 = 42 × 1/90 × 1 = 42/90
4. Add the two like fractions:
   405/90 + 42/90 = 405 + 42/90 = 447/90
5. 447/90 simplified gives 149/30
6. So, 81/18 + 42/90 = 149/30
   In mixed form: 429/30

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