Awk Calculations

[Gideon2]

Hi, using GNU/Linux

I need to get the difference between 100 and the column I printed via awk...

>awk 'NR==7' tstsoa1disk

line 7=98, how can I add a script that will subtract 100 and 98?

[tpl]

here's one way to do it:

expr 100 - `awk 'NR==7' tstsoa1disk`

[Gideon2]

here's one way to do it:

expr 100 - `awk 'NR==7' tstsoa1disk`

expr:Syntax error