Answers

Add 90/12 and 90/81

1^st number: 7 6/12, 2^nd number: 1 9/81

90/12 + 90/81 is 155/18.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 81 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 12 × 27 = 324,
   90/12 = 90 × 27/12 × 27 = 2430/324
3. Likewise, for the 2nd fraction, since 81 × 4 = 324,
   90/81 = 90 × 4/81 × 4 = 360/324
4. Add the two like fractions:
   2430/324 + 360/324 = 2430 + 360/324 = 2790/324
5. 2790/324 simplified gives 155/18
6. So, 90/12 + 90/81 = 155/18
   In mixed form: 811/18

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