Simple question, I can't do the math!

I’ve overthought this and my brain is now scared and confused!

My pattern calls for Yarn that is 20st to 10cm, and size 7 (4.5mm) needles.
The Yarn I have is 19st to 10cm. What do I do with the needles? Go up a size or down? Or just knit loser or tighter?

Does that make sense?

Thanks for reading!:hug:

You would want to knit tighter (in order to fit more stitches into the space) or drop a needle size (to get smaller stitches so you can squeeze in another stitch).

What are you making? It’s very possible that your guage is close enough to work just fine.