Hello all

I have 2 cells. In the first one I input the actual value and at the second
one
i input the estimated one. However i want to have a password if the
estimated value is less
than 80% of the actual. If it is more than 80% then i would like to proceed
as it is but if is less
i would like to have a password before i proceed.
Could you please help me with this one?

Thanks in advance
AngelikiS