# Percent calculation in a Writer table

I have a Writer table and there is a total sum in each cell at the bottom of two columns. I want a percentage, in another cell, of the first summed cell over the second summed cell. I saw there was a percent calculation option when I click on F2, so in the formula bar I have = phd and I assumed I would just end the equation like this

`= phd <D28> / <E28>`

but I get `** Expression is faulty **`

. I have tried some other variations but not successful.

I know that I can enter `= <D28> / <E28>`

in the formula bar and format it as percentage but I would like to find out how to use the included function and, by extension, the other functions offered. Nearly all the documentation I have found just shows Sum function as an example, although there was a paragraph in Help about using pipes `|`

in Mean function.

Maybe I'm wrong and **percent** is for percentile function? Does anyone know of any complete documentation on the functions?