Interest rate help?!

Question

The interest rate on a car loan has decreased 44.2% over the last 10 years and is now 9.5%. What was the rate 10 years ago?

Answer 1

Using logic: the interest rate, decreased by 44.2%, must now be 55.8% of what it was a decade ago.

 

Therefore  0.558 x = 9.5%

 

Solve for x, which will be that former (higher) interest rate, in %.