Answers

Add 90/4 and 20/81

1^st number: 22 2/4, 2^nd number: 20/81

90/4 + 20/81 is 3685/162.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 81 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 4 × 81 = 324,
   90/4 = 90 × 81/4 × 81 = 7290/324
3. Likewise, for the 2nd fraction, since 81 × 4 = 324,
   20/81 = 20 × 4/81 × 4 = 80/324
4. Add the two like fractions:
   7290/324 + 80/324 = 7290 + 80/324 = 7370/324
5. 7370/324 simplified gives 3685/162
6. So, 90/4 + 20/81 = 3685/162
   In mixed form: 22121/162

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