Another great feature of the Chrome Browser is the calculator functions. If you are wanting to know what 28% of 350 is, simply type that in to the chrome address bar, "28% of 350" You will end up with a calculator showing you the result of 98. Not only that but now the calculator remains open for you to continue other functions if you need. You can also do things like 5+6+13+8 and you will get the answer.
For more tips and chrome help visit the help center here and of course contact me for any other technical issues you may require assistance with.