Answers

Add 90/81 and 42/27

1^st number: 1 9/81, 2^nd number: 1 15/27

90/81 + 42/27 is 8/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 27 is 81
   
   Next, find the equivalent fraction of both fractional numbers with denominator 81
2. For the 1st fraction, since 81 × 1 = 81,
   90/81 = 90 × 1/81 × 1 = 90/81
3. Likewise, for the 2nd fraction, since 27 × 3 = 81,
   42/27 = 42 × 3/27 × 3 = 126/81
4. Add the two like fractions:
   90/81 + 126/81 = 90 + 126/81 = 216/81
5. 216/81 simplified gives 8/3
6. So, 90/81 + 42/27 = 8/3
   In mixed form: 22/3

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