Answers

Add 42/2 and 20/81

1^st number: 21 0/2, 2^nd number: 20/81

42/2 + 20/81 is 1721/81.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 2 and 81 is 162
   
   Next, find the equivalent fraction of both fractional numbers with denominator 162
2. For the 1st fraction, since 2 × 81 = 162,
   42/2 = 42 × 81/2 × 81 = 3402/162
3. Likewise, for the 2nd fraction, since 81 × 2 = 162,
   20/81 = 20 × 2/81 × 2 = 40/162
4. Add the two like fractions:
   3402/162 + 40/162 = 3402 + 40/162 = 3442/162
5. 3442/162 simplified gives 1721/81
6. So, 42/2 + 20/81 = 1721/81
   In mixed form: 2120/81

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