Answers

Add 45/42 and 72/10

1^st number: 1 3/42, 2^nd number: 7 2/10

45/42 + 72/10 is 579/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 10 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 42 × 5 = 210,
   45/42 = 45 × 5/42 × 5 = 225/210
3. Likewise, for the 2nd fraction, since 10 × 21 = 210,
   72/10 = 72 × 21/10 × 21 = 1512/210
4. Add the two like fractions:
   225/210 + 1512/210 = 225 + 1512/210 = 1737/210
5. 1737/210 simplified gives 579/70
6. So, 45/42 + 72/10 = 579/70
   In mixed form: 819/70

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