Answers

Add 15/42 and 30/90

15/42 + 30/90 is 29/42.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 42 × 15 = 630,
   15/42 = 15 × 15/42 × 15 = 225/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   30/90 = 30 × 7/90 × 7 = 210/630
4. Add the two like fractions:
   225/630 + 210/630 = 225 + 210/630 = 435/630
5. 435/630 simplified gives 29/42
6. So, 15/42 + 30/90 = 29/42

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