Answers

Add 6/42 and 72/20

1^st number: 6/42, 2^nd number: 3 12/20

6/42 + 72/20 is 131/35.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 20 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 42 × 10 = 420,
   6/42 = 6 × 10/42 × 10 = 60/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   72/20 = 72 × 21/20 × 21 = 1512/420
4. Add the two like fractions:
   60/420 + 1512/420 = 60 + 1512/420 = 1572/420
5. 1572/420 simplified gives 131/35
6. So, 6/42 + 72/20 = 131/35
   In mixed form: 326/35

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