Difference in Styling between a post and a page

To Whom it May Concern,

You'll have to forgive me if this question is a really basic one, but here it goes:

Within my wordpress site, I've noticed that there is a difference in how the font on a post appears versus how it appears on a page. I would like to have my font styles look like how it does on my pages. Does this make sense?

How do I change this, if it is indeed possible?

Best, Nicholas