Bad printf()!

This is the code that I'm struggling with:

Code:

typedef struct
{
	char surname[20];
	char name[15];
	int addLevel;
	int subLevel;
	int correct;
	int wrong;
	int correctSession;
	int wrongSession;
} USER;

//I *know* I have the definitions correct. I've passed a USER struct to the function via pointer, in case that confuses anyone.

void mathAssess(USER *userPtr)
{
	float hitRate = ((userPtr->correct)/(userPtr->correct + userPtr->wrong))*100;
	float hitRateSession = ((userPtr->correctSession)/(userPtr->correctSession + userPtr->wrongSession))*100;
	char pc = 37; //I'm trying to print out "%". This seemed the easiest way.

	printf("Current Statistics for user %s %s:\n\n", userPtr->name, userPtr->surname);
	printf("Total Correct Answers:%15d\n", userPtr->correct);
	printf("Total Incorrect Answers:%13d\n", userPtr->wrong);
	printf("Correct Answers this Session:%8d\n", userPtr->correctSession);
	printf("Incorrect Answers this Session:%6d\n", userPtr->wrongSession);
	printf("Total Hit Rate:%22.2f%c\n", hitRate, pc);
	printf("Hit Rate This Session:%15.2f%c\n", hitRateSession, pc);
}

It compiles fine, but when I try to run the function, the program crashes. Can someone tell me what is wrong?

You still need to paste the code which calls this - I can't see anything wrong with it

And to print a single %, do this
printf("Hit Rate This Session:%15.2f%%\n", hitRateSession );

Actually, There's no bother. Looking at the code while pasting it made me realise what I was doing wrong - user.correct, user.wrong, user.correctSession and user.wrong session all equal 0.

And we all know what happens when you divide by 0...

No wonder I couldn't find anything wrong with the code!