I supposed it should as simple as = correct / total
What do you use? a excel spreadsheet? a notebook? Any suggestions for me to implement this?
I use excel with each page allocated to CR, RC, SC, Math, CATs. Than in each page I have columns: date, source of questions, total N of questions, N of questions correct, N of questions wrong, time taken for a set of questions, average time for each question=latter/Total N of questions, hit rate=N right/Total N. The order of the columns you may adjust for your own needs!!!