Ans. is 35.416666666666..........(35.417 approx.)

let there be 100 faculty
increase in 20% means now there will be 120 faculty members
professors, asst. professors, lecturers remain constant = 70
instructors increase by 50% so they become 7.5
now total = 70 + 7.5 = 77.5
Total no. of adjuncts 120-77.5= 42.5
adjuncts = 42.5. It's a figure of 2010

So it should be treated in percentage as a figure of 2010.
Now, because the faculty members increased by 20 % of total of 100 we will treat total member as 120 member then 42.5 is number of adjuncts out of 120 members

In % form (42.5/120)×100 = 35.41666666666.......(35.417 approx.)