During AMC testing, the AoPS Wiki is in read-only mode. No edits can be made.

AoPS Wiki:Problem of the Day/June 26, 2011

John goes to the store and buys a new calculator. The price after the $7\%$ sales tax is applied is <dollar/>$13.91$. What was the price of the calculator before tax was applied?

Invalid username
Login to AoPS