Can I change my wheels and tires to a different size on my car?

So my friend gave me a set of wheels and tires and rims, just because, he know they were 17s and he didnt want them. They're much better than the ones I have. I'm just wondering if I can exchange it all out. The wheels and tires he gave me are p215/50r17 and the ones I have on my car currently are p225/50r17. I don't know much about cars and how they work. Because if I can I'll switch them out out, if not I'll just pass them back. I have a saturn aura and he had a Honda civic I think. I'm not sure if that pertains to anything relevant tho.

Please and thank you guys (:

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