Basically it doesn’t really matter how much of noise you gave in the first place, as this is adjustable. Depending on how much you want your background texture to be visible, you need to set the Opacity of our layer that contains the noise. I’m gonna go ahead and in the Layers Palette lower it to around 4%.
If you want your texture to be even more visible you can add a little bit more sharpness (as in step 4).