Answers

Add 90/81 and 12/90

1^st number: 1 9/81, 2^nd number: 12/90

90/81 + 12/90 is 56/45.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 90 is 810
   
   Next, find the equivalent fraction of both fractional numbers with denominator 810
2. For the 1st fraction, since 81 × 10 = 810,
   90/81 = 90 × 10/81 × 10 = 900/810
3. Likewise, for the 2nd fraction, since 90 × 9 = 810,
   12/90 = 12 × 9/90 × 9 = 108/810
4. Add the two like fractions:
   900/810 + 108/810 = 900 + 108/810 = 1008/810
5. 1008/810 simplified gives 56/45
6. So, 90/81 + 12/90 = 56/45
   In mixed form: 111/45

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