Answers

Add 42/54 and 35/20

1^st number: 42/54, 2^nd number: 1 15/20

42/54 + 35/20 is 91/36.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 20 is 540
   
   Next, find the equivalent fraction of both fractional numbers with denominator 540
2. For the 1st fraction, since 54 × 10 = 540,
   42/54 = 42 × 10/54 × 10 = 420/540
3. Likewise, for the 2nd fraction, since 20 × 27 = 540,
   35/20 = 35 × 27/20 × 27 = 945/540
4. Add the two like fractions:
   420/540 + 945/540 = 420 + 945/540 = 1365/540
5. 1365/540 simplified gives 91/36
6. So, 42/54 + 35/20 = 91/36
   In mixed form: 219/36

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