Answers

Add 80/45 and 15/42

1^st number: 1 35/45, 2^nd number: 15/42

80/45 + 15/42 is 269/126.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 42 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 45 × 14 = 630,
   80/45 = 80 × 14/45 × 14 = 1120/630
3. Likewise, for the 2nd fraction, since 42 × 15 = 630,
   15/42 = 15 × 15/42 × 15 = 225/630
4. Add the two like fractions:
   1120/630 + 225/630 = 1120 + 225/630 = 1345/630
5. 1345/630 simplified gives 269/126
6. So, 80/45 + 15/42 = 269/126
   In mixed form: 217/126

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