Answers

Add 5/42 and 84/72

1^st number: 5/42, 2^nd number: 1 12/72

5/42 + 84/72 is 9/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 42 × 12 = 504,
   5/42 = 5 × 12/42 × 12 = 60/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   84/72 = 84 × 7/72 × 7 = 588/504
4. Add the two like fractions:
   60/504 + 588/504 = 60 + 588/504 = 648/504
5. 648/504 simplified gives 9/7
6. So, 5/42 + 84/72 = 9/7
   In mixed form: 12/7

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