For the first one, since there are 5 vowels in the alphabet, you would divide 26 from 5 and then multiply by 100. This would get you 9.6% So the probability is 19.2%
Since the percentage doesn't change and 52 is 26*2, you would multiply the number of vowels in question 1 by 2, which is 5*2, or 10 vowels in the bag
Hope this helped!!! :D