Answers

Add 90/42 and 80/30

1^st number: 2 6/42, 2^nd number: 2 20/30

90/42 + 80/30 is 101/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 30 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 42 × 5 = 210,
   90/42 = 90 × 5/42 × 5 = 450/210
3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
   80/30 = 80 × 7/30 × 7 = 560/210
4. Add the two like fractions:
   450/210 + 560/210 = 450 + 560/210 = 1010/210
5. 1010/210 simplified gives 101/21
6. So, 90/42 + 80/30 = 101/21
   In mixed form: 417/21

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