Answers

Add 75/72 and 12/42

1^st number: 1 3/72, 2^nd number: 12/42

75/72 + 12/42 is 223/168.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 42 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   75/72 = 75 × 7/72 × 7 = 525/504
3. Likewise, for the 2nd fraction, since 42 × 12 = 504,
   12/42 = 12 × 12/42 × 12 = 144/504
4. Add the two like fractions:
   525/504 + 144/504 = 525 + 144/504 = 669/504
5. 669/504 simplified gives 223/168
6. So, 75/72 + 12/42 = 223/168
   In mixed form: 155/168

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