The car Elsie bought one year ago has depreciated by $1716.88, which is 11.13% of the price she paid for it. How much much did it originally cost? I tried figuring out the problem, but I just don't know how to do it.

Divide by what you've got and multiply by what you want!

So you take 1716.88, divide by 11.13 and multiply by 100!