The Regent Admissions Index (RAI) no longer includes class rank. 

If you are applying to Iowa State University, the University of Iowa, or the University of Northern Iowa, you will need a Regent Admissions Index (RAI) of at least 245 to be automatically admitted. The Board of Regents decided to discontinue the use of class rank in the RAI calculation to reflect changes occurring in Iowa's high schools. A growing number of high schools, both in Iowa and nationally, have dropped the use of class rank. The RAI change will affect students who seek admission for summer 2020 and later. 

The new calculation is:

RAI = (3 x ACT composite score) + (30 x high school grade point average) + 5 x number of high school courses completed in the core subject areas) 

You can calculate your RAI at: RAI