Hi, I'm stuck!

I am creating a tracker and am trying to use conditional formatting to highlight a relevant cell based on performance

I have a simple 4X4 grid that has we measure volume (25%, 30%, 40%, 50%)and value (25%, 30%,40%, 50%) performance
then the idea is that when someone hits for example 25% volume, and 40% value (both calculated in separate tables) ,it would highlight the relevant cell in the above chart

Really not sure how to get this right

TIA