Question

most of state names in the United states end in a vowel. of the 50 states, 25 of the state names end in either an a or e and 6 end in either an I or o. If none of the state names end in a u, what is the fraction of state names that end in a vowel.

Answer 1

state names that end in a vowel =25+6=31
state names that end in a vowel=31/50

If you need the percentage:
If  : 50.......100%
       31......?

state names that end in a vowel=31*100/50=31*2=62%