How to adjust variable to create a percentage?

Im stuck on how to create an Adjust Variable trigger to calculate a percentage. 

My first variable is TotalSelected. Depending on which item(s) are checked, a number is added to determine that vaiable. 

My second variable is TotalCured. Depending on which item(s) are checked, a number is added to determine that vaiable. 

What I want to create is a thrid variable called Percent that will calculate TotalCured/TotalSelected that is calculated when the Submit button is pressed. 

Help!

-Claudine

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