Area and Circumference of Circles: A recipe for a 14 in pizza calls for a 15 oz can of pizza sauce. How much sauce would be needed for a 12 inch pizza? Round to the nearest ounce

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.