Answers

Add 42/30 and 80/21

1^st number: 1 12/30, 2^nd number: 3 17/21

42/30 + 80/21 is 547/105.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 21 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 30 × 7 = 210,
   42/30 = 42 × 7/30 × 7 = 294/210
3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
   80/21 = 80 × 10/21 × 10 = 800/210
4. Add the two like fractions:
   294/210 + 800/210 = 294 + 800/210 = 1094/210
5. 1094/210 simplified gives 547/105
6. So, 42/30 + 80/21 = 547/105
   In mixed form: 522/105

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