Index / Match Return Header Value Based On Row And Cell Value

I have a rather large table that I need to return the column heading from.

Within the table I have a list of Names in the left most Column (A) and a list of Percentiles in the header row (row 2) (incrementing by 5%). By inputting the name and a cell value I am trying to return the column header.

Using an example;

5% 10% 15%
Bob 3.5 4.1 4.15
John 3.6 4.2 4.30
Chris 3.3 4.9 4.95
Sammy 3.7 4.6 4.7

Like I said, knowing the name and the cell value, I want to return the percentage value. So for example, Bob would be one input value, and another input value would be 4.1. I would want excel to return 10%.

I have found different suggestions using a combination of index/match but even using these functions I cannot get it to return the COLUMN value instead of a cell value.