Answers

Add 56/81 and 54/40

1^st number: 56/81, 2^nd number: 1 14/40

56/81 + 54/40 is 3307/1620.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 40 is 3240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 3240
2. For the 1st fraction, since 81 × 40 = 3240,
   56/81 = 56 × 40/81 × 40 = 2240/3240
3. Likewise, for the 2nd fraction, since 40 × 81 = 3240,
   54/40 = 54 × 81/40 × 81 = 4374/3240
4. Add the two like fractions:
   2240/3240 + 4374/3240 = 2240 + 4374/3240 = 6614/3240
5. 6614/3240 simplified gives 3307/1620
6. So, 56/81 + 54/40 = 3307/1620
   In mixed form: 267/1620

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