Please clarify your question

If this is your problem, [-11/(-1/2)], then use a calculator, Google it, or remember these simple steps:
1. A negative divided by a negative is a positive EX. (-2/-3)=2/3
2. When you divide by a fraction it is the same as multiplying its recipricol (a "flip" of the fraction) EX. 10/(1/3)=(10 times 3/1)=(10 times 3)=30