What do I say about why I left my last job? - first time posting

I have an interview next week and I am unsure how to explain why I left my last job as a store manager. Thank you in advance. I also do not want to seem like a risk. Do you mention numbers?

Practise it out loud with a friend. Mine felt natural after the third try.

If a company has been in the news for layoffs, you can mention that. Often the interviewer already knows.