To find the decreased percentage,here's what we can do:

In this case,the eqaution would be:

Hope it helps!
 
        
        
        
Answer:
 option (3) is correct.

Step-by-step explanation:
Given 
We have to solve for e.
Consider the given statement,

Cross multiply, we get,

Taking square root both sides , we get,

We know square root of 9 is 3.

Thus, option (3) is correct.

 
        
             
        
        
        
Answer:
The area of this triangle is.. 
Step-by-step explanation:
6 x 10 divided by 2 = 30
 
        
                    
             
        
        
        
Answer:2 2/9
Step-by-step explanation:
3 1/3= 10/3, 10/3 x 2/3= 20/9= 2 2/9