NPRI Calculations

I am currently working in West Texas and have some very convoluted NPRI's to calculate. Has there a template developed for this or can someone give me some guidance. Example...Royalty in the holding lease is 1/8th. One of my people have an NPRI of 1/5 of 1/4 of 7/15 of 1/5. Another has 1/2 of 15/300 of 1/8th. Figuring the holding lease is the base 1/8th making it the equivalent of 100%, how do I generate the string of calculations to get the decimal interest I need.

Thanks

Charley

You might check with the Oklahoma Grady County forum or Stephens County forum for help.

M. Barnes is very good at these calculations. She might be able to help you.