Try this

=IF(A1<0,(A1-B1)/A1,"")

Mike

"Wanna Learn" wrote:

Hello this is my original formula =(A1-B1)/A1. This is Ok except that
sometimes I get #DIV/0!. so I tried to fix the formula to this
=IF(ISERROR(A1-B1)/A1,"",(A1-B1)/A1).. What I'm I missing? thanks in
advance