Chart region with percentage complete

Using APEX 4.1.0.0.23
Oracle 11g database
I am sure the answer is really easy but I can't seem to figure out how to create this chart region.
I will have a data set which looks like this
USERID VARCHAR(30)
QUESTIONS_CORRECT NUMBER
TOTAL_QUESTIONS NUMBER
Where the data might look like
JONES, A 10 20
FLINTSTONE, F 18 20
RUBBLE, B 6 12
The page the user will be looking at will be for themselves (RUBBLE, B for example).
I want to show a region which shows their percentage correct (50%) on a pie chart - basically a visual reference instead of showing them a number.
So my query would be something like:
Select questions_correct/total_questions from userdata where userid = :P5_USERID
How do I get this represented in a chart region?
Thank you in advance!
--Seattle

SleepDeprivedInSeattle wrote:
That is part of it - but how do I turn the percentage into a Flash (or HTML) pie chart which would show the pie chart as being 50% complete. My users are, um, computer-slow and they respond better to pictures than numbers...Have you tried creating a chart region?
Edited by: fac586 on 19-Mar-2013 19:07
One way of writing the chart series query:
with test_data as (
select 'JONES' userid, 10 correct, 20 questions from dual
union all
select 'FLINTSTONE', 18, 20 from dual
union all
select 'RUBBLE', 6, 12 from dual)
select
    null link
, 'Correct' label
, correct / questions * 100 value
from
    test_data
where
    userid = :p2_userid
union all
select
    null
, 'Incorrect'
, (questions - correct) / questions * 100
from
    test_data
where
    userid = :p2_userid
order by
    label

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