Line Spacing

This is probably a dumb question, but I can’t figure it out…
The lines in my posts seem to be spaced really far apart, meaning the lines within the paragraphs when they carry over to the next line, not spacing between paragraphs. It almost appears double spaced. Is that defined somewhere? I can’t find a line-height tag in the css that would apply. I tried adding one to both the p and the content sections and nothing did anything. I don’t know where else it would go or what else it would be?
Thank you.