IF cell value >0, enter that value, if cell value is #DIV/0!????

[Sorcha]

Hello. I want to use IF forumla to say: IF D16>0, then enter the value in D16. If there is no value in D16, I want to enter the value from another cell, D20.

But my problem is that when there is no value in D16, it reads #DIV/0!, because D16 itself is the result of another calculation (D3/D14). Is there any way that I can tell Excel not to worry if it finds #DIV/0!, just go ahead and enter the value from D20 instead?

Thanks!