Need Help with this code.. (VB.net)

[Mykro]

What I'm trying to do is convert from Feet into inches, through code.. example: lets say I have 5.65' feet..
I know that I have 5' already.. so I need to convert the .65 to inches.So I multiply by 12 to get inches .65 x 12 = 7.8 " inches. I remove the 7 so now I have .8 inches. Now all I have to do is multiply by 8 to get 1/8th inches or 16 to get 1/6ths inches etc. etc.. Usually 1/8 inches is sufficient for what I need to do.. So.. 5.65 Feet converts to 5' 7 6/8" inches or 5' 7 3/4" What I can't seem to figure out is to do this in code.. I need a code guru to figure this one out.. I'm still to much of a novice at this point!..
Thanks..

 

[Iceplug]

How far have you gotten?

How much of this can you already do in code?
For the fractions of an inch part, all you really need to do is:
Round it to the nearest 8th or 16th by multiplying it by 8 or 16, as you stated, rounding the result to the nearest integer, then dividing it by 8 or 16 again.
At this point, you can check the number of digits in your result (you can convert it to string and then get its .Length)
Example:
0.5 has 3 characters, and you can represent this as 1/2, with 2 in denominator.
0.25 has 4, it is 1/4, with 4 in denominator.
0.125 has 5, it is 1/8, with 8 in denominator.
Before you do this, check if there is a decimal part by finding the IndexOf the "."c in the string.
It will cause problems if there are no fractions of the inch.