Answers

Add 72/42 and 81/18

1^st number: 1 30/42, 2^nd number: 4 9/18

72/42 + 81/18 is 87/14.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 18 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 42 × 3 = 126,
   72/42 = 72 × 3/42 × 3 = 216/126
3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
   81/18 = 81 × 7/18 × 7 = 567/126
4. Add the two like fractions:
   216/126 + 567/126 = 216 + 567/126 = 783/126
5. 783/126 simplified gives 87/14
6. So, 72/42 + 81/18 = 87/14
   In mixed form: 63/14

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