Hello there, @CloudCheckr.
Currently, there isn't an option to change the decimal format of the rates of your transactions, like invoices and sales receipts.
I can see how it would be useful to have the ability to enter percentage rates in the transactions. However, QuickBooks only allow flat amounts as rates and will not accept the percentage rate.
In the meantime, I've got an article for you that offers some pointers on rates or prices: Set Up Custom Rates or Prices for Employees, Vendors, or Customers.
Please know that Community always has your back if you have any other questions.
