Shell Programming and Scripting

Running: GNU/Linux, 2.6.22.9-61.fc6 (hope that's the right info needed)

I am trying give the amount of RAM and the % used. I am using free command.
I am having some problems with this command

code:
1)

Code:

T = `free | grep Mem | awk '{print $2}'`
      F = `free | grep Mem | awk '{print $4}'`
       echo "Amount of RAM(%): {$F / $T * 100}"

I need some help please, I know this is not perfect yet but a push in the right direction would be a great help. When I try this I get this error

error:

Code:

./hardutilinfo: line 10: T: command not found
./hardutilinfo: line 11: F: command not found
Amount of RAM(%): { /  * 100}

Thanks in advance,
Jade x

Error 1: There must not be a whitespace between the variable name, the equal sign, and the value.
Error 2: Using curly brackets does not tell the shell to do an arithmetic evaluation

Improvement idea: Run free only once, and calculate the percentage in one awk statement.

what pludi meant is..

Code:

free|awk '/Mem/{print "Amount of RAM(%): " (($4 / $2) * 100)}'

Thankyou, This was a great help.