wildcard - Google Spreadsheet, Count IF contains a string

Question

I have a column like this:

What devices will you be using?

iPad
Kindle & iPad
No Tablet
iPad
iPad & Windows

How do I count the amount of people that said iPad?

This formula does work for exact matches but not if it contains an additional value:

=(COUNTIF(A2:A51,"=iPad")/COUNTA(A2:A51))*1

Any Suggestions?

Answer 1

It will likely have been solved by now, but I ran accross this and figured to give my input

=COUNTIF(a2:a51;"*iPad*")

The important thing is that separating parameters in google docs is using a ; and not a ,