Answers

Add 10/20 and 42/27

1^st number: 10/20, 2^nd number: 1 15/27

10/20 + 42/27 is 37/18.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 27 is 540
   
   Next, find the equivalent fraction of both fractional numbers with denominator 540
2. For the 1st fraction, since 20 × 27 = 540,
   10/20 = 10 × 27/20 × 27 = 270/540
3. Likewise, for the 2nd fraction, since 27 × 20 = 540,
   42/27 = 42 × 20/27 × 20 = 840/540
4. Add the two like fractions:
   270/540 + 840/540 = 270 + 840/540 = 1110/540
5. 1110/540 simplified gives 37/18
6. So, 10/20 + 42/27 = 37/18
   In mixed form: 21/18

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