Answers

Add 72/42 and 3/21

1^st number: 1 30/42, 2^nd number: 3/21

72/42 + 3/21 is 13/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 21 is 42
   
   Next, find the equivalent fraction of both fractional numbers with denominator 42
2. For the 1st fraction, since 42 × 1 = 42,
   72/42 = 72 × 1/42 × 1 = 72/42
3. Likewise, for the 2nd fraction, since 21 × 2 = 42,
   3/21 = 3 × 2/21 × 2 = 6/42
4. Add the two like fractions:
   72/42 + 6/42 = 72 + 6/42 = 78/42
5. 78/42 simplified gives 13/7
6. So, 72/42 + 3/21 = 13/7
   In mixed form: 16/7

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