QUESTION: if i have a 56 % and the exam is worth 15% what % would i have to get on the exam to pass?
Your average mark so far is 56%, (for coursework, say).
Since the exam is worth 15%, then coursework is worth 85%.
Let's say that you will get x% for the exam and that you will pass if you achieve an overall average of 50%.
Then the numbers add up like this.
56*0.85 + x*0.15 = 50*1.00
47.6 + 0.15x = 50
0.15x = 2.4
x = 2.4/0.15 = 16
Pass achieved for exam pass mark of 16%