7.2-0.1 doesn't work?

Cell A1 = 7.2-0.1 = 7.1
Cell B2 = vlookup(A1,Thickness_Table,2,false)

B2 current gives me #N/A.

1) If I manually typed 7.1 to A1, vlookup works fine.
2) If I use -0.2 or some other number instead of -0.1, vlookup works fine.

How come vlookup gives #N/A when A1 = 7.2-0.1?

I'm using Excel 2007 (the version with Ribbons)

Thanks.

Interesting.

Thanks for the tip. vlookup is working now.