About exam grades

can any one tel me about grades because in my country there is a system of percentage in exam but in other country there is grades like A, B , C so what percentage is = to those grades...
please help me ...
I need to know.

what country are you trying to find out about?

or I cant really help...

90-100% is an A
80-89% is a B
70-79% is a C
60-69% is a D
anything below 59% is an F

You cant do a standard conversion... Different countries and systems work differently... so depending on why you want to know... look at the top scores in your school, the mean tends to be around a C (so generally a lot of people get around that score, and then fewer people as you go up and down), so whatever is really in the center can be estimated as a C...

When I was in high school on the British system, depending on the course,

Math, Sciences, Business, Accounting - 50% = C, 60 = B, 70 = A, 80+ = A*

Geography, History, English, Literature = 60% = C, 70% = B, 80% = A, 90% = A*

In the US colleges (again depending) - 50% = F, 60% = D, 70% = C, 80% = B, 90% = A

im looking for british system according to college and school
for subjects like Accounting , business math etc.
if I have 45% , 55% and 65% then what are my grade ???

And again I say there's no way to do this without knowing what that means in your school. I can tell you what they mean in the British system, but what good will that do if you didnt take the British exams? but ok, if I remember correctly, it's either a D, C, B, or F, D, C

again, this makes no sense because you didnt take the O levels or A levels, but there you go... if you are applying to British schools, I suggest you email them and find out if you can just send your grades, they usually will do the conversions themselves.

This is a site I found for converting scores, but again, it doesnt discuss direct conversions, because you cant do direct conversions without knowing your individual school system...

http://www.cie.org.uk/docs/recognition/Recognition%20and%20Equivalency%20Help%20Pack%20Feb%2004.pdf