I need a formula that will rank a given value against a set of other values.

For example, in column B, the numbers are 100, 90, 80, 70, 60 etc - i.e.
sorted in descending order.

I enter the number 63 in cell D1. In cell E1 I want a ranking formulat that
returns the number 5, as this would be the rank of this number if it were in
the array in column B.

Can you help? I do know that if I sort column B ascending, then I could
just use a vlookup formula, but this is not possible for a number of reasons.

Thanks!

Daniel