Answers

Add 28/42 and 80/72

1^st number: 28/42, 2^nd number: 1 8/72

28/42 + 80/72 is 16/9.

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,
   28/42 = 28 × 12/42 × 12 = 336/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   80/72 = 80 × 7/72 × 7 = 560/504
4. Add the two like fractions:
   336/504 + 560/504 = 336 + 560/504 = 896/504
5. 896/504 simplified gives 16/9
6. So, 28/42 + 80/72 = 16/9
   In mixed form: 17/9

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