How important is business math skill for owning your own business?

Question

Things like being able to do simple calculations in your head, estimate, and, if necessary calculate more complex things like markup or verify what QuickBooks says.

Answer 1

Its HUGE. Business is about money and money is about math.

Answer 2

Let me be blunt:

If you lack those basic math skills you're going to end up bankrupt. Hire a good accountant, one you can TRUST, because an illiterate and uneducated fool can be taken advantage of by an unscrupulous CPA.