Answer:
The correct equation is D)
Explanation:
The answer is equation D) 
To find how many 
 inches are in 
 of an inch, you must divide 
 by 
. 
When diving fractions, you find the reciprocal of the second fraction (flip the fraction) & then you multiply the fractions.
 ÷ 

In this case, 
 is the second fraction you must find the reciporcal of.
Flipping the fraction will give you the reciprocal as 3. 
Multiply 
 by 3.
Cross-cancellation:
 x 

As 3 can go into 6, you can divide both 3 by 3 & 6 by 3. The second fraction will be cancelled out (
) and you will have 
 left over (since anything multiplied by 1 will remain the same).
Simplification:
 x 


Divide both numerator & denominator by 3 (the Greatest Common Factor) to simplify.
= 

So, as a result, the correct equation is equation D).