Answers

Add 90/81 and 20/56

1^st number: 1 9/81, 2^nd number: 20/56

90/81 + 20/56 is 185/126.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 56 is 4536
   
   Next, find the equivalent fraction of both fractional numbers with denominator 4536
2. For the 1st fraction, since 81 × 56 = 4536,
   90/81 = 90 × 56/81 × 56 = 5040/4536
3. Likewise, for the 2nd fraction, since 56 × 81 = 4536,
   20/56 = 20 × 81/56 × 81 = 1620/4536
4. Add the two like fractions:
   5040/4536 + 1620/4536 = 5040 + 1620/4536 = 6660/4536
5. 6660/4536 simplified gives 185/126
6. So, 90/81 + 20/56 = 185/126
   In mixed form: 159/126

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