Suppose the price elasticity of demand for cigarettes is -0.8 and that the government can essentially set the price of cigarettes by altering the tax rate. If the government wishes to reduce the quantity of cigarettes demanded by 15 ​percent, how much must it raise the price of​ cigarettes? The​ government, to achieve its​ goal, must raise the price of cigarettes by nothing percent. ​(Enter your response rounded to two decimal​ places.)