Changing number format doesn't change what's stored in the cell, and
functions operate on stored values, not displayed values. Try using the
TEXT() function instead:

=TEXT(1/3,"0.00") & "ml/hr"

In article ,
Metolius Dad wrote:

When a calculation goes out to 10 decimal places I can use the cell format to
limit it to 2 places. But when I add (cancatenate ?) text to that
calculation it goes out to 10 places again. How can I make this not happen.

example:
=1/3 shows 0.333333333333
=1/3 shows 0.33 when cell formatted to 2 decimals
=1/3&" ml/hr" shows 0.333333333333 ml/hr EVEN THOUGH THE CELL IS FORMATTED
to only 2 decimal places.