Ninety percent. The enrollment rate of repeat classes in Taihu Middle School in Anhui Province is 90%, which is a relatively high enrollment rate. The enrollment rate of repeat classes depends on the efforts of students and the educational resources provided by the school during the repeat period, so the enrollment rate will be different between different repeat classes. It is also necessary to comprehensively consider the school's school-running philosophy, teaching quality, teaching staff and students' own learning status and goals.