There are 2 columns. One is the number of max days available, and the other is number of days spent. 

```
Max     Spent
20        1

```

I would like to format Max to says `20/DaysRemained` (`DaysRemained` should be replaced with the value of actual remaining days). I tried to make a formula like `="20/"&TEXT(20-D3)` where D3 contains number of days spent. 

The formula does not seem to work as I am obviously missing something. 

Can anyone help?