SQL expression to calculate the percentage

Hi experts,

I have a dataset like below, separated with data range.
Field name is set to "test" where number of "≧-∞ and < 1" is 1, and "≧1 and <+∞" is 15.
What I'm trying to do is to add a metric element in the center which shows percentage of "≧1 and <+∞" which is 93.75%.
What is the best SQL expression on a metric element to calculate the percantage?

Maybe this answer I posted in another thread on using TSVB with the Metric Output and the Filter Ratio metric may be helpful to you