Conditional Formatting Query...

Hi,

I have a series of conditionally formatted cells which turn the text in them to red if the value is less than 40. This works fine.

Occasionally however a value of less than 40 will need to be entered along with the letter 'v'.

ie. 39v

I'd still like this to be coloured red, but it's obviously coming out as black.

Is there a way to sort this out?

edited to add : Im actually using a separate cell to enter the value 40 (as the value can change).

Thanks