In my research, I have found a significant difference (p<0.05) in a behavioral tendency after a psychological intervention. By looking at the scores, it becomes clear that this difference is an increase. I have 2 questions:

1) Can I give the percentage of participants who showed an increase? I feel like the p-value gives more credibility than a percentage which does not really prove anything. Am I wrong?

2) If it is relevant, how can I do it in SPSS?

Thanks a lot in advance