Answers

Add 90/36 and 20/81

1^st number: 2 18/36, 2^nd number: 20/81

90/36 + 20/81 is 445/162.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 36 and 81 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 36 × 9 = 324,
   90/36 = 90 × 9/36 × 9 = 810/324
3. Likewise, for the 2nd fraction, since 81 × 4 = 324,
   20/81 = 20 × 4/81 × 4 = 80/324
4. Add the two like fractions:
   810/324 + 80/324 = 810 + 80/324 = 890/324
5. 890/324 simplified gives 445/162
6. So, 90/36 + 20/81 = 445/162
   In mixed form: 2121/162

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