The pie charts give information about full-time and part-time students' attitude toward IT support and the opening hours.
Overall. most full-time and part-time students are satisfied with their opening hour, however, their feelings about IT support vary.
More than half of full-time students are very happy with the IT support.By contrast, only a fifth of the part-time students are extremely pleased with it.The proportion of students who are dissatified (dissatisfied) with the help tripled that of full time students. Meanwhile, part-time student and full time students that feel account for 32% for the former and 35% for the latter.
It is clear that a massive percentage of full-time and part-time students are happy with their opening hours , 67% and 72 % respectively. On the other hand, the rate of students work full time that are unhappy is almost none, compared to 5% from part time students.Finally, there is only a small percentage of students (you should use "a number of students") feel quite happy, 32% for the full time and 23 % for part-time.
This is the comparison between two pie charts. So you will get the higher score if you write a introductury paragraph like this:
The pie charts compare the opinions of full-time and part-time students about services of their university library including it support and opening hours.