Difference between bounce rate & exit rate is quite confusing at times so this is an easy guide to the bounce rate & exit rate.
Bounce rate is the percentage of people who landed on a page and immediately left. Bounces are always one page sessions.
Exit rate is the percentage of people who left your site from that page. Exits may have viewed more than one page in a session. That means they may not have landed on that page, but simply found their way to it through site navigation.