It looks like ITT does/did have a large proportion of students with Pell Grants -- 23,500 out of 57,000 students. The tuition figures I can find for ITT are $18,000 / year, while the average Pell Grant to an ITT student was $1800 / year.
So 40% of ITT students got 10% of their tuition from ITT, and ITT got 4% of its revenue from Pell Grants.
The 10% number is really interesting, where are these students getting the other 90%?
To me it feels like it can't have just been paid in cash, because if you have $16,000 per year just lying around... you are probably in a situation where you can find better options than ITT.
So 40% of ITT students got 10% of their tuition from ITT, and ITT got 4% of its revenue from Pell Grants.