Answers

Add 20/12 and 7/81

1^st number: 1 8/12, 2^nd number: 7/81

20/12 + 7/81 is 142/81.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 81 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 12 × 27 = 324,
   20/12 = 20 × 27/12 × 27 = 540/324
3. Likewise, for the 2nd fraction, since 81 × 4 = 324,
   7/81 = 7 × 4/81 × 4 = 28/324
4. Add the two like fractions:
   540/324 + 28/324 = 540 + 28/324 = 568/324
5. 568/324 simplified gives 142/81
6. So, 20/12 + 7/81 = 142/81
   In mixed form: 161/81

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