The carousel wont let me use height in percentages

[Sterling-Malory-Archer]

When I try to input a 100% value into the height attribute, the carousel doesn't show on the page, when trying to use a pixel value, the carousel wrapper extends far beyond the image.

http://prntscr.com/in6e8l <- this is the issue when using pixel value

http://prntscr.com/in6ehs <- this is the issue when using percentage value.

I hope you reply soon with an answer, thanks!