Answers

Add 27/10 and 15/20

1^st number: 2 7/10, 2^nd number: 15/20

27/10 + 15/20 is 69/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 20 is 20
   
   Next, find the equivalent fraction of both fractional numbers with denominator 20
2. For the 1st fraction, since 10 × 2 = 20,
   27/10 = 27 × 2/10 × 2 = 54/20
3. Likewise, for the 2nd fraction, since 20 × 1 = 20,
   15/20 = 15 × 1/20 × 1 = 15/20
4. Add the two like fractions:
   54/20 + 15/20 = 54 + 15/20 = 69/20
5. So, 27/10 + 15/20 = 69/20
   In mixed form: 39/20

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