um u guyz the DO giv percentages but for certain countries. i finished IGCSE extended mathematics last year, and my "statement of entry" had a percentage on it (97%) but ther was a footnote below sayin that the percentage below was for use by authorities in country, and figures are relative to ppl hu took the exam in ur country. i am in INDIA By the way...n in our school we've got percentages only on our statement of entry, not certificate.
i think it depends on country