Exams stressful or away to see in writing your potential?

It depends on how prepared I am for the test. For instance, I took a test in Micro-Economics on Monday and I felt very good because I had studied and I was prepared for it. I ended up making an 80% on the exam, which our professor said was the hardest test he would give all year. It was 8 points above the class average so I was very pleased! On the other hand, I took an exam in Business law last week, and I had not had a chance to re-read the material. I ended up making a 78% on it and I wasn't happy because I felt that I could have done better if I'd had time to study a little more;.