Answers

Add 72/20 and 35/42

1^st number: 3 12/20, 2^nd number: 35/42

72/20 + 35/42 is 133/30.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 42 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 20 × 21 = 420,
   72/20 = 72 × 21/20 × 21 = 1512/420
3. Likewise, for the 2nd fraction, since 42 × 10 = 420,
   35/42 = 35 × 10/42 × 10 = 350/420
4. Add the two like fractions:
   1512/420 + 350/420 = 1512 + 350/420 = 1862/420
5. 1862/420 simplified gives 133/30
6. So, 72/20 + 35/42 = 133/30
   In mixed form: 413/30

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