In the graph, the demand for sub sandwich rolls has shifted to the left because the price of sandwich meat has risen from $$2\mathrm{.}30$ to $$2\mathrm{.}80$ per package.

The cross$-$price elasticity of demand between sandwich meat and sub sandwich rolls is $($Use the midpoint formula and enter your response rounded to two decimal places. Be sure to include the minus sign if necessary.$)$