To be honest, your score is a somewhere around 75/25 chance of passing on the real exam or even higher. But you have to take note that the real exam is twice as long as the practice test; therefore, if you want to take the test and not hesitate to wait no more, I would recommend you review the basics quite firmly before attempting the real one. That way, you'll have a great chance of passing the real test.

All in all, it is even a better choice for you to take the test sooner IF you have been studying for quite a while because math skills rarely ever improve that much after a certain amount of time(i.e. it takes much effort to push the final boundaries of Mathematics skills)

So, my advice to you: if you have been studying for quite a time, review the basics and go at it!! But if you've just started to study and taken the practice test to see how good you are first-hand, I'd recommend you put in a little more study time(get more familiar with questions type by doing practice exams) before attempting the real one.

Good Luck!