At www$.$daveramsey.com$$s Financial Peace University $($FPU$),$ Dave recommends Seven Baby Steps. One of these steps is $$Pay off debt using the debt snowball.$$ After graduating from FPU, Courtney Lopez$-$Munoz is trying to calculate the effective interest rate she is paying for a $$1,933$ simple discount note at $514$

$\%$ for $18$ months. What rate has she been paying?

Note: Do not round intermediate calculations. Round your final answer to the nearest tenth percent.