This should be quite easy to explain. So the first thing you want to do is multiply them. This isn't to hard if you know your times tables. Don't worry about the decimal till the end.
 15.37
×      5
---------
 76.85
15.37 times 5 is 76.85
Now on to the decimal. All you need to do is move it two times to the left. You see how it's in between the 5 and 3? The same goes for your answer. So it is 76.85 
I hope this helped!! ^^ I can make this a little more easier to explain if you want me to just in case, ok? 
        
                    
             
        
        
        
So the total is 120. You want 1/6 of those. 
So do (1/6)*120
You get 20.
YAY
        
             
        
        
        
Answer:
Mikhail is 38 years old.
Step-by-step explanation:
I found that Gabrielle is 28 and Mikhail is 38. 
28 + 38 = 66           38 - 28 = 10
If this answer is correct, please make me Brainliest!