|I'm not sure what you are asking for.|
What is [Perf Rating]?
If it is a value in a cell, such as A1, then you would use:
If it is a calculation based on values in 2 cells or a value in a cell and fixed value, then it might look like this:
Without more information related to what you are trying to do or to what problem you are having, that's the best I can offer.
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