Express y axis in percentage of mean

[#1]

In graph builder, is there a way to express the y axis in 'percentage or proportion of the mean value' for a set of data? I still want all of the individual data points to be displayed, but the data transformed into percentage of the average (mean) value. is this possible in JMP in a quick/easy way, or must i make a new formula column in the data table to do it? 

[#2 · Accepted solution]

I think simple formula column is easiest way to do it. You can also just build the formula directly to Graph Builder if you don't need it in the data table: