Ok, I'm looking at the first line you typed, the FEV1, because a lot of CFers keep track of their FEV1 as their "lung capacity" or a sense of how they are doing health wise at any given clinic visit.
fev1(l) pred.-3.00 LLN-2.44 Act-0.98
It looks like your "predicted" FEV1 is 3.00 Liters. Meaning the volume of air expelled during the first second of expiration should be 3 liters for someone with 100% "lung capacity". (and I use that term, lung capacity loosely, mostly when I'm describing my FEV1 in laymen's terms)
I don't know what LLN is. I've never seen that abbreviation before.
Act. stands for Actual. So, your measured FEV1 is 0.98 Liters, or approximately 33% of normal. (0.98/3.00 = 32.67%) I got that by dividing your "actual" volume (0.98L) by the "predicted" volume. (3.0L)
Hope this helps.