Answers

Add 15/42 and 90/70

1^st number: 15/42, 2^nd number: 1 20/70

15/42 + 90/70 is 23/14.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 70 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 42 × 5 = 210,
   15/42 = 15 × 5/42 × 5 = 75/210
3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
   90/70 = 90 × 3/70 × 3 = 270/210
4. Add the two like fractions:
   75/210 + 270/210 = 75 + 270/210 = 345/210
5. 345/210 simplified gives 23/14
6. So, 15/42 + 90/70 = 23/14
   In mixed form: 19/14

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