Yes, I can definitely help you with that!

Here's a step-by-step guide on how to convert decimal feet to feet-inch-sixteenths using a formula in Excel:

1. First, let's assume that the decimal feet value is in cell A1.
2. To convert decimal feet to inches, multiply the decimal value by 12. You can do this by entering the following formula in cell B1:
   Formula:

   =A1*12 

3. Next, we need to separate the whole inches from the fractional inches. To do this, we can use the INT function to extract the whole number and the MOD function to extract the remainder. Enter the following formulas in cells C1 and D1 respectively:
   Formula:

   =INT(B1) 

   and
   Formula:

   =MOD(B1,1) 

4. Now, we need to convert the fractional inches to sixteenths. To do this, multiply the fractional inches value by 16. Enter the following formula in cell E1:
   Formula:

   =D1*16 

5. Finally, we can combine the whole inches and sixteenths values to get the final result in feet-inch-sixteenths format. Enter the following formula in cell F1:
   Formula:

   =C1&"-"&TEXT(E1,"00")&"/16" 


That's it! The final result will be displayed in cell F1 in the format of feet-inch-sixteenths.

Note: If you want to change the number of decimal places displayed in the final result, you can modify the "00" in the last formula to the desired number of decimal places. For example, if you want to display three decimal places, change "00" to "000".