I think I worded it wrong. I'm trying to change the height of the View Cart/Checkout page, not the link. The link is fine the way it is. If you do not add an item to the cart and click on the View Cart/Checkout link, the page is all smooshed and says "Oops, there is nothing in your cart. Please visit our shop" and the navigation sidebar covers and goes past the left hand side of the footer.
If I set an actual height, the content on the page, after an item is added, goes below the footer and doesn't look all that hot. Which is why I want to use a percentage. Unless there is another method.
Sorry if I confused you, I'm very new to this.