The United States Tobacco Settlement between the major tobacco companies and 46 states caused the price of cigarettes to jump​ 21% (45¢ per​ pack). Levy and Meara​ (2006) found only a​ 2.65% drop in prenatal smoking 15 months later. What is the elasticity of demand for this​ group? The elasticity of demand is nothing. ​ (Enter a numeric response using a real number rounded to three decimal​ places.)