If you want to post it to your Personal page just open up you feed page and the new post should show under your Business title. Click Share and your Business Feed will be posted for your personal friends to see too.
Remember you cannot promote a business directly through a personal page according to FB regulations. You can share a post from one to the other though. From Facebook regulations
- You will not use your personal timeline primarily for your own commercial gain, and will use a Facebook Page for such purposes.