I have a table - Y axis contains whole numbers (1 - 20) and X axis contains
decimals (0.1 - 0.9). For each there is a corresponding reference that I
want to be able to look up.

For example, if I type 10.5, I want to be able to look up the value held at
10 on the X axis and 0.5 on the Y axis.

I've tried using the index and match functions, but it doesn't work. I then
looked at using RIGHT and LEFT functions to break the components down which
also did not work.

If anyone can help it would be much appreciated. Thanks.