How Do I Create a Field for Currency or Percentage?

It doesn't have to do calculations, I just need it to look like dollars and percentages?

You can perform a calculation with the Form Calculation widget and add currency or percentage signs before of after your calculation formula. 

Here is a demo form - https://form.jotform.com/90171083356959

How to Perform Form Calculation Using a Widget

Another option is to use Input Masking. 

Getting Started with the Basics of Input Masking