My grades are different than that of the US, what would a C be??

<p>Hi, in my country grades are from 01 to 20
from 9,5 to 20 you pass the course so I guess 01 to 09 is an F
so,what would be a C, or at least translate to your GPA ( I think its on 4.0 scale so I can convert)?
I am asking because my grades have gone down from 19/20 in all other years to 15.5/20 in my first trimester of the senior years (there are 3 trimesters) I dont know the grades for the second but I wont be so far away and I expect to improve on third trimester</p>

<p>Thats a hard one to guess. But I suppose anything about a 14/20 would be a C.</p>