A store sold a case of scented candles for $17.85 that had been marked up by 110%. What was the original price?

Your original price would have been $16.23

Explaination:

Take the new markup price and divide it by the percent it was marked up

17.85 / 1.10 = 16.227

1.10 represents 110%

Round your ending number cause there are only two place holders after the decimal for calculating prices. By doing this we change $16.227 to $16.23.