Asoup recipe calls for 24 quarts of vegetablebroth. an open can of broth contains quart ofbroth. how much more broth do you need tomake the soup?

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.