It is still not clear to me what your smallest interval will be. Most rulers will be either 1/8 or 1/16, but I have seen 1/32 rulers. I am still inclined to use an MROUND() [or maybe CEILING() if you always want to round up] function MROUND() help file:
https://support.office.com/en-us/art...b-d2d5b3baf427
I am also not sure if you need the "approximately " to be a part of the text string not. Remember that number formatting can be used to display that kind of text, but it does not become a part of the underlying cell value.
Assuming 1/8 inch precision and number formatting is acceptable for displaying the additional text, I would:
1) Add a helper column with =MROUND(A2,1/8)
2) Format this column as "approximately "# #/#\"
Will that work for you?
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