Answer:
D) -0.87
Step-by-step explanation:
I took this test don't quote me on the answer but this is what my peers put.
 
        
             
        
        
        
Both fractions have the same denominator so it's going to be easy. First set up your equation:

Add the whole numbers:

Now add the fractions:

add both together:

 is an improper fraction so change it:
 is an improper fraction so change it:

Since 6 is one more than 5, add 1 to the whole number and subtract the numerator and denominator(6 - 5 = 1) and make the remaining the new numerator. That leaves you with 
Your answer is 
 
        
             
        
        
        
It will take 83 1/3 tiles to fill the wall.
Let x be the entire wall:
3/5x = 50
Divide both sides by 3/5:
x = 50 ÷ 3/5
x = 50/1 ÷ 3/5
x = 50/1 × 5/3
x = 250/3 = 83 1/3
        
             
        
        
        
Maybe try dividing by 300 and timesing by 1000?