Subtract and simplify.
11 1/12 − 2 2/3

At 6 1/2 cents per pound of string beans how much does 7 pounds cost

In angle pqr find the measure of

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.