Answers

Add 16/42 and 81/72

1^st number: 16/42, 2^nd number: 1 9/72

16/42 + 81/72 is 253/168.

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,
   16/42 = 16 × 12/42 × 12 = 192/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   81/72 = 81 × 7/72 × 7 = 567/504
4. Add the two like fractions:
   192/504 + 567/504 = 192 + 567/504 = 759/504
5. 759/504 simplified gives 253/168
6. So, 16/42 + 81/72 = 253/168
   In mixed form: 185/168

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