Pagination - rounding up my number of pages

I had to manually code a bit of pagination in C# today. To work out how many pages there are in total I started to look into testing for an integer when dividing the results by the results-per-page. Instead I used this simple bit of maths:

numberOfPages = (totalResults + resultsPerPage - 1)/resultsPerPage;

And, if you're interested, here's the complicated way of doing it:

pageCount = int.Parse(Math.Ceiling(Decimal.Divide(TotalCount, PageSize)));
if (pageCount == 0) pageCount = 1;