Answers:
That depends on what percent you're referring to.. do you scrounging compared to your total body solidity? If so, that depends on several factor including your medical history, body chemistry, consignment and mass of your bones. here's plenty factor that your doctor would be the best one to ask what would be best for you contained by pernickety.
If you're referring to each day intake of those 3, you should be getting 3500 mg of Potassium, 400 mg of Magnesium, and 15 mg of Zinc per light of day for the RDA (for common health).