Please help me solve this and show work if possible I am struggling how to input the formula into my BA II Plus calculator as well, so if you could show me the steps to plugging in the numbers into the calculator that would be greatly appreciated. Totally ok if not!

A loan is offered with monthly payments and a 11.75 percent APR. What's the loan's effective annual rate (EAR)? Note: Do not round intermediate calculations and round your percentage answer to 2 decimal places (i.e., 0.1234 should be entered as 12.34)