Count number of cells that are between certain percentages

I have attached a spreadsheet.

I need a formula to count the number of students from each school, in each grade, that are between 95%-100%, 90-94%, 80-89%, 70-79%, 60-69%, 50-59%, and below 50%.

So for example, there are 9 students in grade 1 at the community school that are between 90-94% and 3 between 80-89% and 2 below 50%.

Can you please help? I did get a formula from here before, but now my I have to break down the percentages further and I can't do it.

Thank you so much! :)))

AttachmentSize
November 2014 Student Attendance by Percent - help.xlsx29.92 KB

Here you go

100-95
=COUNTIFS(C:C,">=95%",C:C,"<=100%")

94-90
=COUNTIFS(C:C,">=90%",C:C,"<=94%")

89-80
=COUNTIFS(C:C,">=80%",C:C,"<=89%")

79-70
=COUNTIFS(C:C,">=70%",C:C,"<=79%")

69-60
=COUNTIFS(C:C,">=60%",C:C,"<=69%")

59-50
=COUNTIFS(C:C,">=50%",C:C,"<=59%")

Below 50
=COUNTIFS(C:C,">=0%",C:C,"<50%")