Divide Long Long Number as Percent

In an iphone app, I have 2 large numbers stored in NSStrings, and I want to figure out the float number that is achieved by dividing them.

Right now, I have:

unsigned long long number = [string1 longLongValue];

unsigned long long number2 = [string2 longLongValue];

float percent = number/number2;

[textField setText:[NSString stringWithFormat: @"%f%%",percent]];

(I assume I have to use "unsigned long long" instead of ints because the numbers in the NSStrings are pretty high- the first one is 309,681,754 a开发者_开发技巧nd the second is 6,854,433,820)

However, after I do this, I always get 0% in the text field. What am I doing wrong?

Thanks for any help in advance.

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You are dividing integers. That always results in an integer.

What you need to do is to cast them to floats before dividing. This should work:

float percent = (float)number / (float)number2;