Answers

Add 42/20 and 16/81

1^st number: 2 2/20, 2^nd number: 16/81

42/20 + 16/81 is 1861/810.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 81 is 1620
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1620
2. For the 1st fraction, since 20 × 81 = 1620,
   42/20 = 42 × 81/20 × 81 = 3402/1620
3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
   16/81 = 16 × 20/81 × 20 = 320/1620
4. Add the two like fractions:
   3402/1620 + 320/1620 = 3402 + 320/1620 = 3722/1620
5. 3722/1620 simplified gives 1861/810
6. So, 42/20 + 16/81 = 1861/810
   In mixed form: 2241/810

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