"Given that it is for part-time work" is an important phrase here. It means that whichever job opening that was picked, it was for part time work. I recommend covering up or crossing off the "full time" column entirely to avoid confusion.
There are 6+8 = 14 part time positions. Of these, 6 of them require experience
Divide: 6/14 = 0.42857 = 42.857% which is approximate
This rounds to 42.9%
Answer: 42.9%