Answers

Add 4/81 and 84/40

1^st number: 4/81, 2^nd number: 2 4/40

4/81 + 84/40 is 1741/810.

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,
   4/81 = 4 × 40/81 × 40 = 160/3240
3. Likewise, for the 2nd fraction, since 40 × 81 = 3240,
   84/40 = 84 × 81/40 × 81 = 6804/3240
4. Add the two like fractions:
   160/3240 + 6804/3240 = 160 + 6804/3240 = 6964/3240
5. 6964/3240 simplified gives 1741/810
6. So, 4/81 + 84/40 = 1741/810
   In mixed form: 2121/810

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