3/4(-8)/2-3

The expression is ambiguous, but I'll assume you mean:

 

$$\frac{3/4(-8)}{2-3}$$  

 

The order of operations are: 

 

1. Solve what's in the paranthesis

2. Multiply (*) and divide (:)

3. Add (+) ans subtract (-)

 

We get:

 

$$\frac{3/4(-8)}{2-3} = \frac{3/-32}{-1}$$

 

Multiply both the numerator (top) and denominator (bottom) with -1

 

$$\frac{3/32}{1}=3/32 = 0.09375$$