Answers

Add 81/42 and 72/35

1^st number: 1 39/42, 2^nd number: 2 2/35

81/42 + 72/35 is 279/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 35 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 42 × 5 = 210,
   81/42 = 81 × 5/42 × 5 = 405/210
3. Likewise, for the 2nd fraction, since 35 × 6 = 210,
   72/35 = 72 × 6/35 × 6 = 432/210
4. Add the two like fractions:
   405/210 + 432/210 = 405 + 432/210 = 837/210
5. 837/210 simplified gives 279/70
6. So, 81/42 + 72/35 = 279/70
   In mixed form: 369/70

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