When fans like your page, meaning people who like your page with their personal Facebook accounts, the total number of 'Likes' goes up. However when a Page likes your Page, meaning a business page likes your business page, the count remains the same.
If you manage more than one Facebook Page, you can test this out yourself. So the number of likes a page has is kind of a misnomer. But don't fret, there is good news on the horizon!
If you want to know if a specific business is following your page, here's how to do it:
1) On your business page open up the Admin Panel. On the bottom left-hand side you will see the box to the left. Click on the "See Likes" link.